Black Nylon Hooded Twin Wheel Caster The Black Hooded Twin Wheel Caster is available with 50mm Polyurethane Wheels. This caster will work well on either hard floor surfaces or short pile carpet. It will not mark or scratch any hardwood floors. Recommended for any hard floor surface: hardwood, ceramic tile, marble, cement, extra thick plastic mats. Can also be used on short pile carpet. When used on carpets, normal carpet wear can be expected. Polyurethane will not mark or scratch hard floor surfaces. Nylon Body - Hooded - Choice of mountings - Grip Neck Stem & Grip Ring Stem are available with or without a socket. Available with 50mm wheels only - Color: Flat Black ( Only )