Pneumatic Wheel, 350 lb Load Rating, Sawtooth Tread, 10 in Wheel Dia., 2 1/8 in Wheel Width, For Axle Size 1/2 in, 4.10/3.50-4, Easy Maintenance Tire Rim Type, Center Mount Hub Position, 3 1/2 in Hub Length, Steel Hub Material, No Non-Marking