Experience maximum durability and performance with the Caster Wheel Model. Made from high-quality Bright Zinc Plated Steel and Polyurethane, each 6" wheel has a 2" thickness and can hold up to 1200 lbs. With a total capacity of 4800 lbs, this 4-pack includes 2 swivel w/ brakes and 2 rigid casters for versatile use. The roller bearing with hardened raceway ensures quiet operation and superior floor protection. Enjoy peace of mind with the 90-day hassle-free return policy and lifetime warranty.