Feature:1. The pedal surface is made of premium aluminum alloy, rustproof and high strength.2. Chromium molybdenum steel wheel axle has excellent durability and stability.3. The selflocking device is antiskid, making it safer to ride on rough ground.4. Selflocking pedals correct your position and make cycling easier.5. It comes with accessories for easy installation. A good bicycle companion.Specification:Item Type: Bike PedalsModel: R21Material: Aluminum Alloy + Chromiummolybdenum SteelColor: As Pictures Shown Product Size: Approx. 90 x 100mm/ 3.5 x 3.9inCompatible with for SPD SLSpindle: 9/16"Applicable Model: For mountain bike.Package List:1 Pair Bike Pedals1 Pair Lock Cleat6 x Screws6 x Fittings3 x SpannerNote:1. Please allow 13cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.