The overall dimension of the wheel (diameter x width) is 150mm x 25mm, the internal diameter of the center bearing is 8mm and the length of the axle bolts is 84mm. (PLEASE check the detailed dimensions on the third photo before purchasing)The package includes 2 gray front spare wheels, 2 axles, easy and convenient to install without complicated steps, saving your effort and time.Made of high quality and eco-friendly rubber, this solid replacement wheel set is anti-slip and dust-proof with strong wear resistance and load-bearing capacity.Wide application on handicapped vehicles, healthcare vehicles, etc., compatible with most wheelchairs, rollators, walkers or other replacement accessories with 6" wheels.This front wheel replacement set will provide a quiet, smooth and light ride on all surfaces, suitable for indoor and outdoor use, labor-saving, practical and long-lasting.Product DescriptionChoose this set of 6 inch rubber replacement wheels for wheelchairs, walkers, walkers and replace them easily and conveniently on your own.Specification:Material: Solid RubberGrey colorOverall dimension of the wheel (diameter x width): 150 mm x 25 mmInternal diameter of the central bearing: 8 mmDistance between bearings on both sides: 50mmAxle bolt length: 84mmTotal weight: 700gThe package includes:2 black 6 inch front spare wheels2 x axle bolts