Item Type: Stair Climbing Wheel Material: Rubber, Galvanized Iron Single Wheel Size (Diameter x Width): Approx. 160 x 40mm / 6.3 x 1.57in Load Capacity: 300lbs 1[Triangular Wheel for Stairs] The triangular wheel shape allows for smoother movement and stability on staircases, ideal for transportation. 2[Solid Replacement Wheel] The tire part adopts solid rubber material, more sturdy and explosion proof, eliminating the need for inflation. 3[Non Slip] The textured surface of the wheel tire ensures excellent slip and wear resistance, enhances safety, elastic rubber is suitable for various road surfaces. 4[Galvanized Iron Hub] The galvanized iron hub of this wheel is difficult to rust and more hard, ensuring durability and strength for heavy loads. 5[300lbs Load Capacity] This wheel with galvanized iron hub and solid rubber tire can support up to 300lbs of weight, making it suitable for various applications.1 x Stair Climbing Wheel