[Heavy-duty & ] - The Bed Frame Wheels Rollers for Bed Replacement Parts Heavy Capacity Bed Roller Wheels Replacement with Brakes for Bed Frame Set of 4 are made from high-quality PP materials. The PP is hard, strong and smmoth rolling, ensuring long-lasting performance and durability. [Excellent Bearings & Side-Brakes & Safety] - Each set caster wheels boast a bearing capacity of 1200LBS, providing superior stability and smooth rolling movement. The side brakes on these bed roller wheels prevent accidental movement, ensuring a safe and secure environment. [Easy Installation & Widely-Application] - Size of the bed casters: 2.07Inch W x 1.875Inch D x 4.25Inch H. These bed casters come with a simple locking mechanism, making them easy to install on most with standard leg sockets. [Widely-Application] - These heavy-duty bed casters are ideal for replacing existing wheels or for use in applications, such as hospitals, dormitories, and hotels. [Bed Casters & Caster Cups] - The bed frame wheels and caster cup are both necessary. We provide the caster cups Color:As Shown Material:Metal+Plastic Package Contents: 4 * Bed Casters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.