Key Parameters: Bolt Spacing of Master Cylinder Brake Pedal: 0.787" / 20 mm; Master Cylinder Mounting Hole: 2.36" / 60 mm center to center. Three rubber brake hoses: 34" / 860 mm, 43" / 1090 mm, 75" / 1900 mm. Complete Accessories: The go-kart hydraulic brake assembly includes a master cylinder, three brake calipers, three brake hoses, and brand-new brake discs. It comes ready to install, pressurized with brake fluid. Do not worry about bleeding the brakes. Quality Material: The master cylinder of this go-kart brake kit is made of high-performance aluminum, preloaded with DOT3 brake fluid. The brake discs are constructed from high-quality steel, durable and lasting for daily use. Promised Braking & Cooling: This hydraulic brake kit features heavy-duty stopping power for everyday drivability. Drilled & slotted rotors improve heat dissipation during extreme conditions. High Adaptability: This go-kart hydraulic brake kit is compatible with Hammerhead and Trailmaster karts and other 150cc go-karts. It provides superior performance demanded by off-road enthusiasts.