For aluminum rims (strong when wet); 4 piece set (screws included); Shimano 9S, 10S, 11S (BR-9000) SRAM compatible; BXP has excellent braking performance when wet and normal times than conventional GHPII (green) and the rim side slings are less noticeable. ·We cannot accept returns or exchanges due to differences in color. Product specifications may change without prior notice. Thank you for your understanding. If you are unsure about handling the product, please consult your local bicycle store or specialty store.