Master Caster 64526 Twin Swivelwheel Nylon & Urethane Casters, Flat Stem, Matte Black, 5 per Set Duet twin wheel Master Casters with a contemporary design.Contemporary design, strength and performance make these replacement casters an excellent choice for office and home furnishings.With appropriate stems and fasteners, each caster can be used on wood, metal and tubular metal chairs, furniture and other equipment.All casters carry the manufacturers guarantee against defects in material and workmanship.For light to medium duty.Wheels rotate independently. - Casters