[Home](./index.md) > [bitburner](./bitburner.md) > [WarehouseAPI](./bitburner.warehouseapi.md) > [limitMaterialProduction](./bitburner.warehouseapi.limitmaterialproduction.md) ## WarehouseAPI.limitMaterialProduction() method Limit material production. **Signature:** ```typescript limitMaterialProduction(divisionName: string, city: CityName, materialName: CorpMaterialName, qty: number): void; ``` ## Parameters

Parameter	Type	Description
divisionName	string	Name of the division.
city	[CityName](./bitburner.cityname.md)	Name of the city.
materialName	[CorpMaterialName](./bitburner.corpmaterialname.md)	Name of the material.
qty	number	Amount to limit to. Pass a negative value to remove the limit instead.

**Returns:** void ## Remarks RAM cost: 20 GB