wheel:trp tyre + pp rim hosing: swivel bolt hole stainless steel caster bearing: agile double ball bearing 1. wheel size: 50*22mm,75*22mm,100*23mm, 125*23mm2. load capacity: 40kg,60kg,70kg,80kg3. total height: 73mm,103mm,125mm 152mm4.Bearing: Ball bearing Stainless steel tpr caster 15k23440sztl