HAOFANG Bike Brakes Calipers Set, fits Children Bike,Brakes' Arch is Approx 65-80mm, Long-Reach Rear & Front C Caliper Brake Set fits Children Bike C Shape Brake Specification: Made of aluminum alloy material,lightweight and durable. Caliper Reach: Approx 45-55mm  Outer cover is covered with black leather tube Adjustable brake: the upper ..