[STURDY and DURABLE: This bike flat pedals was made with CNC integration aluminum alloy material gives you a sense of security. The spindle was made of chrome-molybdenum steel material which is stronger than ordinary steel and features better load-bearing performance RIDE SAFELY WITH REFLECTOR : The bike pedals have a reflector on the sides that can help drivers notice the up and down movement of pedaling.SIZE:3.94*3.62*0.71inch 0.76lb each pair EASY TO INSTALL : CR-L for left pedal CR-R for right pedal Universal Standard 9/16 inch Cr-Mo steel spindle suitable for most of mountain bikes MTB road bikes urban bikes BMX bikes etc SEALED BEARING : 3 Sealed DU bearing bicycle pedals protect spindles from water and dust, keep pedals spin smooth and without noise Even if they are covered with a thick layer of mud after a muddy ride. Just enjoy you cycling in raining or climbing Bike Pedals : Any questions about Bike Pedals please contact us by email]