Universal Caster Set, mounting plate: 5-3/8" x 5-3/8 x 7-1/2", traingle, wheels: (4) heavy dity, 5" dia., all swivel, (2) with brakes, 500lbs capacity per caster, grease-resistant, non-making, polyurethane, temperature range 14° to 212°F (-10° to 100°C) NSF