Product Description Specifications Bridge Bolt Tubes for various Wilwood calipers with a .260” ID, .500” OD and various lengths for specific caliper styles and rotor width. Made from high strength aluminum alloy and anodized for corrosion resistance or a bright polished finish. Category: Brakes, Rotors & Pads>Brake Hardware Core: N LTL: N MPN: 300-6685 Proposition 65: N Special Order: Y Clearance Item: N