Set of Hayes Prime brake pads, including 2 brake pads (left and right), spring, pin, bedding in instructions.Long Lasting Braking Power:- Developed to provide constant braking power, high modulation, and comfort on the brake lever, as well as slow wear across all temperature conditions.That is what makes the s530 compound especially suitable for e-bikes and other heavy bicycles with extra long pad life and highly resistant to fade.27% Improvement in friction coefficient compared with Shimano G03A pads 44% Improvement in friction coefficient compared with Swissstop 28E pads