Description: * Swivel Casters 1.5 Inch Solid Rubber 360 Degree M8 x 10mm Threaded Caster Wheels with Brake Black 33lb Capacity Each , 8 Pcs . * Get smooth, quiet rolling and full swivel action, all while protecting your floors. * Perfect replacement for home or office chairs that have hard, noisy, rough plastic wheels. * Note: Each caster capacity is 15kg, total capacity for all 4 casters is 45kg (calculated by 3 casters ). Because when the floor is uneven, there will be only 3 casters bearing weight.