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 manufacturer’s guarantee against defects in material and workmanship. To ensure proper support and safe rolling, neck must fit 1-1/2" diameter chair base so that base and caster fit together as a solid unit. Euro designed 2 3/16" dual wheel casters, for bases with 1-1/2" dia. oversized necks, make the caster and base appear as one. Stem Type: B; K; Wheel Tread: Hard; Color(s): Matte Black; Material(s): Nylon.