diff --git a/components/home/FactorySelect/FactorySelect.module.css b/components/home/FactorySelect/FactorySelect.module.css
index 3f7a073..299601f 100644
--- a/components/home/FactorySelect/FactorySelect.module.css
+++ b/components/home/FactorySelect/FactorySelect.module.css
@@ -2,6 +2,10 @@
     padding: 0.3em;
 }
 
+.select :global(.factory-select__multi-value) {
+    --fixed-item-bg: #ccc;
+}
+
 @media (prefers-color-scheme: dark) {
     .select :global(.factory-select__control) {
         background-color: #222;
@@ -10,6 +14,8 @@
     .select :global(.factory-select__multi-value),
     .select :global(.factory-select__menu) {
         background-color: #444;
+
+        --fixed-item-bg: #666;
     }
 
     .option:is(:hover, :focus-visible) {
diff --git a/components/home/FactorySelect/FactorySelect.tsx b/components/home/FactorySelect/FactorySelect.tsx
index 7aa66a4..53361dc 100644
--- a/components/home/FactorySelect/FactorySelect.tsx
+++ b/components/home/FactorySelect/FactorySelect.tsx
@@ -1,33 +1,93 @@
-import { FC, memo, useMemo } from 'react'
-import Select from 'react-select'
+import { FC, memo, useCallback, useEffect, useMemo } from 'react'
+import Select, { ActionMeta, CSSObjectWithLabel } from 'react-select'
 import { isNonNullable } from '../../../src/utils'
-import details from '../../../res/details.json'
 import styles from './FactorySelect.module.css'
+import { useFactories } from '../../../src/hooks/useFactories'
 import { EntitySpan } from '../EntitySpan/EntitySpan'
 
 interface Props {
   id: string
   factories: string[]
   onSetFactories: (factories: string[]) => void
+  fixInputs?: boolean
 }
 
-const options = details.map(detail => ({
-  label: detail.name,
-  value: detail.href
-}))
+interface Option {
+  label: string
+  value: string
+  isFixed: boolean
+}
+
+const selectStyles: Record<
+  'multiValue' | 'multiValueLabel' | 'multiValueRemove',
+  (base: CSSObjectWithLabel, state: { data: Option }) => CSSObjectWithLabel
+> = {
+  multiValue: (base, state) => {
+    return state.data.isFixed
+      ? { ...base, backgroundColor: 'var(--fixed-item-bg) !important' }
+      : base
+  },
+  multiValueLabel: (base, state) => {
+    return state.data.isFixed ? { ...base, fontWeight: 'bold', paddingRight: '6px' } : base
+  },
+  multiValueRemove: (base, state) => {
+    return state.data.isFixed ? { ...base, display: 'none' } : base
+  }
+}
+
+const orderOptions = (values: Option[]) => {
+  return values.filter(v => v.isFixed).concat(values.filter(v => !v.isFixed))
+}
+
+const FactorySelectBase: FC<Props> = ({ id, factories, onSetFactories, fixInputs }) => {
+  const { factories: details } = useFactories()
+  const options = useMemo<Option[]>(
+    () =>
+      details.map(detail => ({
+        label: detail.name,
+        value: detail.href,
+        isFixed: !!fixInputs && !detail.recipe
+      })),
+    [details, fixInputs]
+  )
 
-const FactorySelectBase: FC<Props> = ({ id, factories, onSetFactories }) => {
   const state = useMemo<typeof options>(() => {
     return factories
       .map(factory => options.find(option => option.value === factory))
       .filter(isNonNullable)
-  }, [factories])
+  }, [factories, options])
+
+  useEffect(() => {
+    if (!fixInputs) return
+    const set = new Set(factories)
+    const addOptions = options
+      .filter(option => option.isFixed && !set.has(option.value))
+      .map(option => option.value)
+    if (addOptions.length) {
+      onSetFactories([...factories, ...addOptions])
+    }
+  }, [factories, fixInputs, onSetFactories, options])
+
+  const onChange = useCallback(
+    (values: readonly Option[], { action, removedValue }: ActionMeta<Option>) => {
+      if ((action === 'remove-value' || action === 'pop-value') && removedValue.isFixed) {
+        return
+      } else if (action === 'clear') {
+        const clearedValues = orderOptions(options.filter(v => v.isFixed))
+        onSetFactories(clearedValues.map(s => s?.value))
+      } else {
+        onSetFactories(values.map(s => s?.value))
+      }
+    },
+    [onSetFactories, options]
+  )
 
   return (
     <Select
       id={id}
       instanceId={id}
-      value={state}
+      value={orderOptions(state)}
+      isClearable={state.some(option => !option.isFixed)}
       components={{
         MultiValueLabel: ({ data, innerProps }) => (
           <EntitySpan {...innerProps} value={data.value} simpleStyle={true} />
@@ -39,12 +99,11 @@ const FactorySelectBase: FC<Props> = ({ id, factories, onSetFactories }) => {
         )
       }}
       isMulti
-      options={options as never}
-      onChange={e => {
-        onSetFactories(e.map(s => s?.value))
-      }}
+      options={orderOptions(options)}
+      onChange={onChange}
       className={styles.select}
       classNamePrefix={'factory-select'}
+      styles={selectStyles}
     />
   )
 }
diff --git a/components/home/Preferences/Preferences.tsx b/components/home/Preferences/Preferences.tsx
index 22551f3..43fb0ca 100644
--- a/components/home/Preferences/Preferences.tsx
+++ b/components/home/Preferences/Preferences.tsx
@@ -14,6 +14,7 @@ export const Preferences: FC = () => {
           id={'baseFactoriesSelect'}
           factories={baseFactories}
           onSetFactories={setBaseFactories}
+          fixInputs={true}
         />
       </fieldset>
       <fieldset>
diff --git a/res/exclude.json b/res/exclude.json
new file mode 100644
index 0000000..14d6a9c
--- /dev/null
+++ b/res/exclude.json
@@ -0,0 +1,7 @@
+[
+  "/Blueprint",
+  "/Deconstruction_planner",
+  "/Upgrade_planner",
+  "/Blueprint_book",
+  "/Space_science_pack"
+]
diff --git a/res/manual.json b/res/manual.json
index 7cc7f3c..0903e1f 100644
--- a/res/manual.json
+++ b/res/manual.json
@@ -71,5 +71,124 @@
         "/Solid_fuel": 1
       }
     }
+  },
+  {
+    "name": "Crude oil barrel",
+    "href": "/Crude_oil_barrel",
+    "image": "/images/thumb/Crude_oil_barrel.png/32px-Crude_oil_barrel.png",
+    "recipe": {
+      "prerequisites": {
+        "/Empty_barrel": 1,
+        "/Crude_oil": 50
+      },
+      "time": 0.2,
+      "output": {
+        "/Crude_oil_barrel": 1
+      }
+    }
+  },
+  {
+    "name": "Heavy oil barrel",
+    "href": "/Heavy_oil_barrel",
+    "image": "/images/thumb/Heavy_oil_barrel.png/32px-Heavy_oil_barrel.png",
+    "recipe": {
+      "prerequisites": {
+        "/Empty_barrel": 1,
+        "/Heavy_oil": 50
+      },
+      "time": 0.2,
+      "output": {
+        "/Heavy_oil_barrel": 1
+      }
+    }
+  },
+  {
+    "name": "Light oil barrel",
+    "href": "/Light_oil_barrel",
+    "image": "/images/thumb/Light_oil_barrel.png/32px-Light_oil_barrel.png",
+    "recipe": {
+      "prerequisites": {
+        "/Empty_barrel": 1,
+        "/Light_oil": 50
+      },
+      "time": 0.2,
+      "output": {
+        "/Light_oil_barrel": 1
+      }
+    }
+  },
+  {
+    "name": "Lubricant barrel",
+    "href": "/Lubricant_barrel",
+    "image": "/images/thumb/Lubricant_barrel.png/32px-Lubricant_barrel.png",
+    "recipe": {
+      "prerequisites": {
+        "/Empty_barrel": 1,
+        "/Lubricant": 50
+      },
+      "time": 0.2,
+      "output": {
+        "/Lubricant_barrel": 1
+      }
+    }
+  },
+  {
+    "name": "Petroleum gas barrel",
+    "href": "/Petroleum_gas_barrel",
+    "image": "/images/thumb/Petroleum_gas_barrel.png/32px-Petroleum_gas_barrel.png",
+    "recipe": {
+      "prerequisites": {
+        "/Empty_barrel": 1,
+        "/Petroleum_gas": 50
+      },
+      "time": 0.2,
+      "output": {
+        "/Petroleum_gas_barrel": 1
+      }
+    }
+  },
+  {
+    "name": "Sulfuric acid barrel",
+    "href": "/Sulfuric_acid_barrel",
+    "image": "/images/thumb/Sulfuric_acid_barrel.png/32px-Sulfuric_acid_barrel.png",
+    "recipe": {
+      "prerequisites": {
+        "/Empty_barrel": 1,
+        "/Sulfuric_acid": 50
+      },
+      "time": 0.2,
+      "output": {
+        "/Sulfuric_acid_barrel": 1
+      }
+    }
+  },
+  {
+    "name": "Water barrel",
+    "href": "/Water_barrel",
+    "image": "/images/thumb/Water_barrel.png/32px-Water_barrel.png",
+    "recipe": {
+      "prerequisites": {
+        "/Empty_barrel": 1,
+        "/Water": 50
+      },
+      "time": 0.2,
+      "output": {
+        "/Water_barrel": 1
+      }
+    }
+  },
+  {
+    "name": "Steam",
+    "href": "/Steam",
+    "image": "/images/thumb/Steam.png/32px-Steam.png",
+    "recipe": {
+      "prerequisites": {
+        "/Water": 1
+      },
+      "time": 0,
+      "output": {
+        "/Steam": 1
+      }
+    }
   }
 ]
diff --git a/src/hooks/useFactories.ts b/src/hooks/useFactories.ts
index d518a2b..0946b60 100644
--- a/src/hooks/useFactories.ts
+++ b/src/hooks/useFactories.ts
@@ -1,15 +1,22 @@
 import { EnrichedEntity, Entity } from '../types'
 import details from '../../res/details.json'
 import manual from '../../res/manual.json'
+import exclude from '../../res/exclude.json'
 
-const joined = [...details, ...manual] as Entity[]
+const manualEntities = manual as Entity[]
+const manualKeys = new Set(manualEntities.map(entity => entity.href))
+const detailEntities = (details as Entity[]).filter(detail => !manualKeys.has(detail.href))
 
-const factories = joined.map((detail: EnrichedEntity) => {
-  detail.usedBy = joined.filter(f =>
-    Object.keys(f.recipe?.prerequisites ?? {}).includes(detail.href)
-  )
-  return detail
-})
+const joined = [...detailEntities, ...manualEntities]
+
+const factories = joined
+  .map((detail: EnrichedEntity) => {
+    detail.usedBy = joined.filter(f =>
+      Object.keys(f.recipe?.prerequisites ?? {}).includes(detail.href)
+    )
+    return detail
+  })
+  .filter(detail => !(exclude as string[]).includes(detail.href))
 
 const detailsMap = Object.fromEntries(
   factories.map((detail: EnrichedEntity) => [detail.href, detail])
diff --git a/src/types.ts b/src/types.ts
index bc6014f..817a002 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -1,7 +1,7 @@
 export interface Recipe {
-  prerequisites: Dict<number>
+  prerequisites: Dict<number | undefined>
   time: number
-  output: Dict<number>
+  output: Dict<number | undefined>
 }
 
 export interface UnfetchedEntity {
diff --git a/tsconfig.test.json b/tsconfig.test.json
index ae129f9..c17d2ec 100644
--- a/tsconfig.test.json
+++ b/tsconfig.test.json
@@ -6,7 +6,8 @@
     "jest.config.js",
     "next.config.js",
     "src/backend-custom-server/index",
-    "scripts/*"
+    "scripts/*",
+    "res/*.json"
   ],
   "exclude": ["dist", ".next", "out", "node_modules", "cypress"]
 }