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 Includes 1750mm hose length Weight listed includes 85mm length hose and 160mm rotor with hardware Optional Speed Lock technology greatly facilitates installation of the brakes on frames that have internally routed housing, USE FA7149 and FA-7087