Use rubber material for integrated molding, damping, wear, matching double bearings, flexible rotation, can also withstand a lot of weight. New and high-quality replacement wheels for suitcases, roller skates, casterboards, scooters, can be mounted with 45mm wheels. Very quiet running, wear-resistant, absorbs shocks. Size: OD 50 * W18 mm / 1.97 inches x 0.71 inches; Standard center bearing ID - 6 mm (0.24 inches); Axles 30 mm (1.18 inches) and 35 mm (1.38 inches). Easy to use - 1. Use a hacksaw to cut off the rod connecting the wheels. 2. Put on the new ones with the included accessories. Package includes: 4 x 1.97 inch wheels, 4 x 1.18 inch axles, 4 x 1.38 inch axles, 8 x axle screws, 8 x washers, 2 x wrenches. Color: black Material: rubber Package contents: 1 set x luggage replacement wheels Only the above package content, other products are not included. Note: Light reflections and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3 cm.