Feature: 1. QUIET DESIGN: PU rubber material reduces the noise generated by the trolley case during traveling, enjoy a comfortable and quiet trip alone. 2. STABLE AND SMOOTH: Strong bearing support provides stable and smooth movement experience, easy to deal with various ground conditions. 3. EASY TO REPLACE: Easy to replace the wheels, no tedious operation to repair the luggage, saving time and energy. 4. RUBBER MATERIAL: Wear resistant and durable, optimized design of PU rubber material, anti pressure and anti stretching, long lasting use without deformation. 5. UNIVERSAL WHEEL DESIGN: Universal wheel design, 360 degree rotation, easy to maneuver, enhance travel convenience. Specification: Item Type: Luggage Suitcase Replacement Wheels Product Material: PU Rubber Gross Weight: 185-215g/6.5-7.6oz. Package List: 2 x Rubber Universal Casters4 x Spacer2 x Screws2 x Screw Sleeves2 x Hex Wrench Note: All data are measured manually, and there are certain errors in the measurement results.