MATERIAL: These stem casters are made of polypropylene (PP) and steel LOAD CAPACITY: 25 kg per caster, caster construction is sturdy and durable SIZE: The rod is 8mm in diameter and 38mm in length. Used with the socket attached, it provides a secure fit SOFT RUNNING: Ball bearings and 360 degree rotating casters allow heavy furniture to be moved freely when needed, smooth PP surface prevents scratches on the floor PERFECT FOR: Furniture projects and replacing old and worn casters. Antique brass color provides a vintage look, fits your kitchen cart, laundry cart, accent chair, office chair, side table, coffee table, cabinet and trundle bed Size:50mm Casters with Sockets If you are working on a furniture project or looking for replacements for old worn out casters, our stem casters would be a good choice for you. These stem casters are strong and durable. Perfect for carts, chairs, sofas, tables, cabinets and beds. Specifications: < p>Material: Polypropylene(PP) and steel Load capacity: 40kg per castor Threaded rod size: 8mm in diameter and 38mm in length Ball diameter: 50mm Total height: 10cm Color: antique brass Package includes: 4Roulette rod with socket