Feature●package: contains 2 pairs/4 pcs mountain bicycle brake pads. Each brake pad comes with 5 spacers and 1 hex nut. We also provide 1 L-shaped hexagon wrench for easy installation and removal.●Material: Our bike brake pad is made of rubber and aluminum alloy. With diagonal grooves surface, the bicycle brake pad can increase friction to effectively stop your bike and smooth out sand and gravel.●Design: The bicycle brake block adopts a micro-radian design to better fit the bicycle tire. The slightly curved design will not harm the rim, and provide better braking force.●Application: This bicycle brake pad is suitable for bicycles over 20 inches and all V-type road bike brake systems, with excellent braking effect, making your riding more stable and faster even in rain and snow.●After Service：If you are not satisfied with our product you received, you can send emails to us at any time. We will reply you instantly and help you solve your problem.Description Application: This bicycle brake pad is suitable for bicycles over 20 inches and all V-type road bike brake systems, with excellent braking effect, making your riding more stable and faster even in rain and snow.