1.High-quality rubber and metal, convenient, durable and practical.2.PVC coated wheel's capacity is 15kg.3.Easy to install in a few minutes4.Stainless steel coated wheel's capacity is 25kg.5.Triple-cornered frame wheel/Climbing wheels,casters with bearing , for Shopping cart wheels,Baby carriage,Furniture CasterMaterial: PVCColor: BlackWheel Diameter: 9cmHeight: 21.5cmApplications: Shopping Cart, Trolley, Baby CarriagePackage Contents:2 * Triple-cornered wheelOnly the above package content, other products are not included.Note: Light 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.