OUR SPROCKET BRAKE KITS INCLUDE: 4 PISTON Chrome CALIPER WITH INTEGRAL MOUNT FOR 1" or 3/4 Axle. 48t Or 51T

Features of AccessoriesHD Sprotor The sprotor features  a 4 piston caliper, massive stopping power. Can be used on either left or right side drive- 51 tooth stainless steel sprocket-clean polished finish- 1" or 3/4" axle fitment