God-jewel caster series 1.Size:40/50/63mm 2.Wheel material:PP & PU (optional) 3.Bearing:double-row ball beaing 4.Color:yellow blue & black avaliable 5.Bracket:black lacquer Matches with different fittings:fixed,plate swivel,threaded stem,plate swivel with brake and threaded stem with brake. Available sizes: Plate Swivel caster Plate Swivel Double Brake caster Threaded Swivel caster Threaded Brake caster Fixed caster Load capacity (kg) wheel size(mm)Overall height (mm) Mounting hole size (mm) J21-40-xxxJ24-40-xxxJ22-40-xxxJ25-40-xxxJ23-40-xxx4040*32596.2J21-50-xxxJ24-50-xxxJ22-50-xxxJ25-50-xxxJ23-50-xxx5550*26746.2J21-63-xxxJ24-63-xxxJ22-63-xxxJ25-63-xxxJ23-63-xxx10063.5*329510.5* Please contact us if you have any questions about our available sizes Good quality and reasonable price. Welcome to inquiry!