... website for your inquiry.Company InformationsDetailed Product Description Caster: 1.Wheel:PA,PU tyre+PP core 2.Diameter:50mm3.Fixed height ... ,threaded stem,grip stem,bolt hole Caster Features:1.caster: swivel caster without brake2.PU: excellent anti-abrasion,floor protection and ... appliance,official appliance,shop,supermarket, etc. Workshop Special Test MachinesCertifications swivel suitcase wheel