Master Casters Superball Casters Superball Master Casters 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. Casters carry the manufacturers guarantee against defects in material and workmanship. Dual usage caster features a specially molded soft tread vinyl ball wheel that provides safe rolling on hard floor surfaces, chair mats and low pile carpeting. Double ball bearing raceways ensure perfect swiveling. Weight rated: 75 lbs. per caster. Set of four. HOW TO SELECT CASTERS 1. Remove caster from leg of chair base. 2. Select the correct length and diameter of stem. (Tops of stems can be flat or roundedeither will fit.) Bright Chrome Finish Soft Vinyl Wheel Tread 3/8w x 1-1/8h Stem