Faultless swivel threaded stem caster with brake new ergonomic design gives you higher quality, better performance and greater durability. Full double hardened raceways allow ball bearings to roll smoothly yet will not mar most surfaces. Zinc plated finish. Tpr rubber wheels are gray non-marking with a polyolefin hub. They have a good load carrying ability and are quiet rolling; allowing for a soft ride while protecting floors. Image shown without brake.