This item is a pack of mechanical rear disc brake with 2 brakes set which are made of stainless steel and aluminum. Rotors have a great shape, minimal scratch or mark on the items, and it fits for most applications. Features - ColorAssorted Color - Material: Plastic and metal - Size: Approx. 27x16.5x5cm - Great shape, minimal scratches or marks on the items. Complete set, pulled from a large frame, fit most applications. - Felt great on the test ride, plenty of material on the pads, caliper design. - Loosen the screws and install the rear calipers onto the disc brake bracket of the frame. - Warm Tip: Dear buyer, due to lighting effect, monitors brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Package list: 1 set of bike brake kit