... 3.Stem Dia 21mm*H 48mm scaffold construction&real estate caster wheel with brake zinc plated finished to resist dent,corrosion.advantage ... :use for medical trolleys,beds,machinery caster wheels etc.Specification: Size75*32mm,100*32mm,125*32mmaccording to ... you. 1. material: 2.size: 3.color: 4.mounting ways(fixed,plate,thread,bolt hole) 5.quantity: 6.surface finishing: 7 ...