Precision CNC-machined billet aluminum construction Features differential bore technology, dual seal technology for optimum performance Hard coated 7075 aerospace alloy pistons and chrome grade 8 hardware Dual, hidden bleeder for easy bleeding Quick-change design for easy pad maintenance Proudly Made in the U.S.A. For replacement pads, see 1721-2455 or 1720-0215 For use with custom 13" rotors only. CALIPER LH 6P 13" GLD 00+