HB-323 dual piston hydraulic disc brake is made of high qualityaluminum alloy material, semi-metal brake pad has strong brakingforce, quiet and durable. It is pre-filled with mineral oil, easy toinstall and comes with IS/PM universal mounting adapter. Suitablefor mountain bike, MTB, road bike, e-bike, scooter, folding bikes, fatbike, bmx etc. It is a fine choice for cycling enthusiasts HB-323 Double Piston Hydraulic Disc Brake:Brand: AEYINO Model: HB-323 Color: Black Brake Type: Disc brake Hydraulic Control Way: Left-Rear and Right-Front Length of front cable: 800mm Length of rear cable: 1500mm Suit for Handlebar Clamp: 22.2mm Adapter Size: 160mm (PM/IS Universal) Weight: 709g Cylinder: integrated cylinder Braking: two-way braking Oil Type: Mineral Oil Package includes: A pair of hydrauli.