Description: [Material]: These Stair Climbing Wheels are crafted from iron frame, ensuring a lightweight yet sturdy structure that can withstand regular use [Size for Versatility]: The Shopping Cart Caster have a diameter of approximately 3.54inch, with height measuring about 8.66inch, making them suitable for various types of carts [Enhance Stability with Anti Slip Design]: These Stair Climbing Caster Triangle Trolley Wheel offer strong load bearing capacity and an anti slip design to ensure stable performance on all surface without the need for inflation [Easy Installation Process]: Designed as direct replacement parts for your old components, these Stair Climber Dolly can be easily assembled onto the axle, simplifying the upgrade process [Wide Range of Applications]: The Cart Caster is ideal as foam tri wheel replacements for shopping carts, multi functional carts, laundry carts, folding carts, portable carts, and stair climbing carts among others Specification: Height: 22cm or 8.66inch Wheel Diameter: 9cm or 3.54inch Package Includes: 2 Stair Climbing Wheels Note: Please allow slightly errors 1-2cm differences due to manual measurement. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.