AHL 4pairs Bicycle Disc Brake Pads for Shimano Acera / Alivio / Deore M515 M515-LA M515-LA-M M525 M505 M510 M525 M575 M601 M775 Nexave C501 C601 Excellent braking power and quiet braking in wet & dry conditions Medium hardness and better heat dissipation,long lasting performance Using the best semi-metal material,high wear resistant,effectively protect the brake disc Smooth and compact braking,comfortable braking feeling with low noise Quality Assurance!If you are not satisfied with our products,we accept all of the return,replacement or refund requests