Material Iron There is some color difference Item dimensions L x W x H 10 x 6.5 x 1.5 centimeters Number of 8 pieces About this item What you will get: 4 pairs of semi-metallic bicycle brake pads for convenient and quick replacement and longer service time Material: semi-metallic copper brake pad, containing more than 30% carbon fiber copper (containing 99.9% copper) to increase heat dissipation and wear resistance, break-in time, braking reaction is direct, sensitive; Fast flat road and high-speed breakthrough can also achieve stable braking effect and reduce product wear rate Compatible with: M315, M355 M515, M515-LA-M, M525. Nexave C501, C601, M375, M395, M415, M416, M446, M465, M475, M485, M486 oil such as appearance can be applied as a plate Grade cycle brake pads : our products have passed strict inspection and control, and are free of asbestos, iron and harmful substances Feature: beautiful appearance, good braking effect, quiet, wear-resistant, safe, stable, comfortable and practical