Caster Wheel: black hard rubber Fork: high grade Q235 steel yoke Loading capacity: 45kg,60kg Wheel diameter: 50mm,75mm caster:Wheel: black hard rubberFork: high grade Q235 steel yokeLoading capacity: 45kg,60kgWheel diameter: 50mm,75mmTread width: 22mm,25mmBearing: roller bearing,double ball bearingSteel thickness: 3x2.5x3mmFinish: Zinc-plated,Chrome-platedApplicable temperature: -10~60Wheel ...