Shimano BR-M9000-Kit Disk Brake Assembled Kit Disk Brake Assembled Set, 1 Caliper + 1 Brake Lever Race related power ratio (same as M987) Lightweight construction. Magnesium caliper and master cylinder. CFRP lever blade. Titanium mounting bolts. Aluminum backed pad. Improved modulation and control. Balanced rigidity of BR/BH/BL Various levels of heat control. Insulated piston (GFRP) & insulated pad coating and ICE TECHNOLOGY FREEZA rotor for more heat resistance (vs. M987) I-spec II. Narrow band increases available handle bar space Wt: 316g (Kit for front)