●EXCELLENT MATERIAL: Package include 1 pair :1 left /1 right.Made of Aluminum Alloy. Stury enough for kids daily cycling. ●EASY TO INSTALL: Display "L" and "R" for easy installation.Good replacement for you childs bike.Suitable for 12" -20" childrens bike. ●COST-EFFECTIVE: High quality and low price, it is your best choice ●GOOD DESIGN: Double-sided ball bearings design, make your the bike pedals more smooth and more effortless, very suitable for children. ●QUALITY ASSURANCE: Great quality guarantee & limited one-year manufacturers warranty included.