... any kindsof bolt stems according to our customers,and the plate stems, U-bracket, plastic cover also. Welcome to ... capacity:40kg5.Tread size: M8X15mm6.Brake: Nylon brake7.Finish: zinc-plated8.Type: swivel9.Mounting: top plate,threaded stem,grip stem,bolt ... brake2.PU: excellent anti-abrasion,floor protection and rotary quietness3.brake: Nylon brake4.finish: zinc-plated resist to corrosion,chrome ...