... 2)Fork: cold-roller steel yoke 3)Wheel diameter: 100mm,125mm,160mm,200mm caster:Wheel: PU tyre + PP rimFork: high grade cold-roller ... : swivel,rigidMounting: top plateFeatures:1.caster: rigid caster, swivel caster2.PU wheel: excellent rolling resistance,anti-abrasion,water resistance,chemical stability,etc ...