The Olympic J5FBA-4 Stem Caster Kit includes a set of four 5" swivel casters with brakes, designed for a load capacity of 1200 lbs each. Made by Olympic, a reputable brand in material handling equipment, these gray rubber casters are a reliable and durable option for various industrial and commercial applications. With the added feature of swivel functionality, these casters provide smooth and easy mobility for wheeled equipment or carts. Ideal for businesses looking to improve their material handling systems, this set of four casters offers both quality and performance.