This 4-pack of swivel casters with brakes is made of thermoplastic rubber and has a total load capacity of 1200 pounds. It includes four casters with a plate mount design and a top plate size of 2-3/8" by 3-5/8". With a wheel width of 1-1/4" and a wheel diameter of 3.5", these casters are suitable for heavy-duty applications in warehouses, factories, furniture, and kitchens. The swivel feature allows for 360-degree rotation, while the brakes keep your equipment stable and secure. These casters provide superior floor protection, quieter operation, and come with a lifetime warranty and a 90-day hassle-free return policy.