2pcs 6 Inch Wheelchair Rubber Wheel Front Wheels Rollator Walker Non-slip Casters Casters Wheels Universal Wheelchair Overall wheel dimension diameter x width is 150mm x 24mm / 5.9 x 0.94, center bearing inner diameter is 8mm / 0.3, axle screws length is 75mm/2.95. Check the detailed dimensions on the third picture before purchasing Package includes 2x Gray Front Spare Wheels, 2x Axles, install without complicated steps, saving your effort and cost and time Made of rubber material, this solid wheel set is anti-slip and dustproof with wear resistance and load-bearing capacity Wide application on handicapped vehicles, health care vehicles, etc, compatible with most wheelchairs, walkers, rollators or other replacement accessories with 6" wheels This front wheel set will provide a quiet, smooth and light ride on all surfaces, compatible with indoor and outdoor use, economical, practical and long term to use Choose 6 inch rubber wheel set compatible with wheelchairs, rollators, walkers and replace them on your own Specification Material Solid Rubber Color Grey Overall Wheel Dimension Diameter x width 150mm x 24mm / 5.9 x 0.94 Center bearing inner diameter 8mm / 0.3 Distance between bearings on both sides 40mm / 1.57 Axle bolt length 75mm / 2.95 Total weight 700g Package includes 2 x 6 inch grey front spare wheels 2 x axle screws