Heavy Duty Office Chair Casters 2-3/8" (60mm) Pacer Hardwood Floor Safe Wheels Set of 5 Durable die cast metal body Urethane Wheel - Safe for all floors - Non-marking and non-marring Large size 2-3/8" (60mm) 100 pound capacity per caster 2-3/4" Mounting Height Grip ring stem size: 7/16" diameter; 7/8" length