1. Ball caster for furniture 2. Sofa caster, stool caster 3. Zinc plated steel bracket 4. High abrasion resistant ability Caster: 1. Wheel: plastic ball caster, for sofa, cair, stool, table, cribs, trolley ect. 2. Housing: galvanized steel, there are top-plate type, threaded stem type, swivel with socket, U shape housing. Detail specification: 1. Wheel diameter: 40mm 2. Load capacity: 25kg 3. ...