Function: 1. SAFE AND EXPLOSION RESISTANT: Koło is strong and explosion-proof, no pumping, easy to use and replace 2. DURABLE MATERIAL: The robust koło is made of polyurethane PU hub, rust-resistant and durable, with high load capacity 3. STABLE AND NON-SLIP: The tire texture is non-slip and wear-resistant, suitable for all types of road surfaces, with stable performance 4. APPLICABLE SCENARIO: Solid koło PU adopts professional design and accurate production process, suitable for electric wheelchairs, strollers, etc. 5. SHOCK ABSORPTION AND LOW NOISE: This is a solid koło of polyurethane, no noise with good cushioning effect Specification: Item Type: koło Wheelchair Material: PU Wheel Outside Diameter: 7 inches Wheel thickness: approx. 47mm / 1.85 inch Center inner diameter of the hole: approx. 8mm / 0.31 inch Distance between center holes: approx. 59mm / 2.32in List of packages: 1 x koło wheelchair Install and use directly.