Description: Specifications: Suitable for B-pillar forks or B-pillar frame mounting Disc brake conversion seat suitable for front fork 160MM Disc brake conversion seat suitable for frame 140MM High quality aftermarket ultra light weight construction CNC Fits all brands bike 2 Bolts are included Before buying, be sure to distinguish whether your frame is A-pillar or B-pillar. Specification: Material: Aluminum alloy + steel screw with gasket Size: approx.84.2x19x10mm/3.31x0.75x0.39inch Package Includes: 1 Piece Bike Disc Brake Mount