The total dimension of the wheel (diameter x width) is 150 mm x 24 mm / 5.9 x 0.94, the inner diameter of the central bearing is 8 mm / 0.3, and the length of the axle screws is 75 mm / 2.95. (Please check the detailed dimensions in the third image before purchasing) The package includes 2 x gray front replacement wheels, 2 x axles, simple and convenient installation without complicated steps, saving time and effort. Made of high-quality and environmentally friendly rubber material, this solid replacement wheel set is non-slip and dustproof with strong wear resistance and load capacity. Wide application to disability vehicles, healthcare vehicles, etc., compatible with most wheelchairs, rollators, walkers, or other replacement accessories with 6-inch wheels. This front replacement wheel set will provide a quiet, smooth, and easy ride on all surfaces, suitable for indoor and outdoor use, economical, practical, and long-lasting to use. Choose c and 6-inch rubber brake set for wheelchairs, rollators, walkers, and replace them easily and conveniently on your own. Specification: Material: Solid Rubber Color: Gray Total wheel dimension (Diameter x width): 150 mm x 24 mm / 5.9 x 0.94 Inner diameter of the central bearing: 8 mm / 0.3 Distance between bearings on both sides: 40 mm / 1.57 Axle screw length: 75 mm / 2.95 Total weight: 700 g Package includes: 2 x 6-inch black front replacement wheels 2 x axle screws.