Harper Trucks Pneumatic Hand Truck Wheel with Ball Bearings and Steel Hub, 10" Diameter x 3-1/2" Wide Ball bearings provide easy-to-push, smooth, stable motion for your hand truck Pneumatic wheels act as a shock absorber providing a smoother, more cushioned ride and improved maneuverability 10-Inch x 3-1/2-Inch with a 2-1/4-Inch hub Designed for a 5/8-Inch axle Made in the USA