Precision CNC-machined 6061 Billet Aluminum construction Direct Bolt-On Engineering Design to the popular 108 mm mounting brackets used by leading custom suppliers of HD Performance Lower Leg Sets & Custom Front Ends Features differential bore technology for optimum performance Designed with Dual EPDM Copolymer Seals and Stainless-Steel Pistons Shipped complete with Chrome Grade 8 Hardware and fittings Quick-change design for easy pad maintenance Dual, hidden bleeder for easy bleeding HHI custom calipers are inherently stronger, with enhanced rigidity, and weigh less than the average stock or OEM caliper 11.8" & 13" brake rotor install parts are included in the kit Made in the U.S.A.. CALIPER RH 6P BLK 00