Aluminum Alloy Border Blue Black Bike Pedals For MTB Folding Bicycle Size: 4" x 3" x 1", Axle Diameter: 9/16" - comes in pair Material: Made of high quality aluminum alloys design with non slip teeth, good abrasion resistance and corrosion resistant performance. Advantage: Antiskid teeth, strong grasps, no longer skid. Reflectors can be seen in low-light conditions, make cycling safer. Ultra light hollow design, reduce the wind resistance. Installation: The pedal axis screw distinguish left and right, "R" "L" mark the direction of right and left. We suggest to use 15mm professional open end wrench to install the pedals. Suitable for: BMX, mountain bikes, road bikes, fixed gear bikes, etc.