Formula CURA 4 Disc Brake Kit Four 18mm diameter pistons provide unimaginable power and outstanding modulation Large reservoir with multiple bleed ports for worry free bleeding Uses Formula’s mineral oil that has a higher boiling point and lower freezing point than other mineral oils Optional Speed Lock technology greatly facilitates installation of the brakes on frames that have internally routed housing (sold separately) Weight listed includes 85mm of hose and 160mm rotor with hardware Ambidextrous, Flip/Flop style lever Caliper: 74mm post mount Rotor: Sold Separately