Yosa brake disc sets For AVID BB7+HS1/G3, 2x BB7 brake clipers+2x HS1 G3 disc rotors+16pcs bolts mtb bicycle brake New 2012 Avid BB7 Mechanical Disc Brake Calipers+HS1/G3 rotors Caliper Design: Mechanical, Forged 2-piece Aluminum Finish; Graphite Grey Adjustment; Dual Knob Pad Adjustment, Tri-Align Caliper Positioning quantity:1pair