Features: 4.5 wide platform reduces the chance of slipping off. Hollow and lightweight design improves pedaling efficiency. 18pcs non-slip stainless steel nails provide excellent grip and control. Dustproof ring and cap protect the bearings from water and dust. Installation is super easy with marking. L for left pedal,R for right pedal. Specification: Color: Black / Red (optional) Material: Nylon body + Chrome molybdenum steel spindle + Stainless steel nails Spindle: 9/16 inch (14mm) Size: 115*130mm / 4.5*5.1in Total weight: approx. 335g / 11.8oz Package size: 230*130*30mm / 9.1*5.1*1.2in Package weight: approx. 360g / 12.7oz Package List: 1* Pair of Pedal 1* 8mm Wrench 4* Spare Nail 4* Washer