The manufacturer's receiving department accepts raw materials and components made by subcontractors. All materials are inspected, accepted or returned to the supplier, logged in, and stored until they are needed on the production lines. Most of the components for mops are made by outside suppliers specializing in producing plastics, metal products, wood handles or tubular metal handles, and sponges. Yarn fibers that are used to make dust and wet mops are ordered in bulk quantities and processed by the manufacturer.