SRAM Maven Base Disc Brake Caliper Assembly - Front/Rear, Post Mount, 4-Piston, Diffusion Black, A1Modern mountain bikes have redefined what riders are capable of, pushing the requirements for heavy duty power further than ever before. Maven is SRAM's answer to that evolution, with monstrous pistons driving more power. Compatible with SRAM model: DB MVN BSE A1 Hose sold separate 2 Piece forged aluminum caliper Stiff 4 piston caliper with best heat management and easier bolt access Organic pads come standard for the best modulation and the quietest