XH&reg; 2pcs Axles Aluminum Alloy Stunt Foot Pegs Pedal for BMX Bicycle Cycling Suitable for front or rear axles. For the types of 9 MM axis bicycles, exclude Fast disassembly type Hub axis Diameter of Thread: Approx. 3/8 inch. Length: Approx. 2.75inch / 6.9cm&lt; Material: aluminium alloy Tips: Please do not stand on top, which will increase the rider in danger in the road. To avoid danger, do not load more than 60kg