Features: Featuring a stable Triangular structure designs, this Shopping Cart Caster offers enhances stability when transporting goods. This Stair Climbing Wheel is make of Stainless steel materials, ensuring durability and stability. This Wheel can be installed or removed with ease and convenience, making it user friendly. Suitable for shopping carts, grocery carts, laundry carts, foldable carts, stair climbing carts, trolley carts, hand trucks, luggage carts. The Cart Caster serves as a helper to transport items effortlessly, making your shopping trip easy and more efficient. Specifications: Materials: Stainless steel Small wheel diameter: about 9cm/3.54inch Package Includes: 2Pcs Stair Climbing Wheel note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.