This brake master cylinder from Wilwood has been designed for use with kart braking systems which use a single caliper on the rear axle. The kit includes a fluid reservoir, mounting bracket and operating lever with several hole positions to alter the ratio for different applications.Designed for kart braking systems with a single rear caliperUniversal fitment, can me made to fit most kart chassisMulti drilled lever allows for various ratiosIncludes mounting bracket and fluid reservoirDimensions: Total length - 5.04" (128mm)Bore size - 0.50" (12.7mm)Cylinder stroke - 0.70" (17.8mm)Fluid outlet - 1/8" NPT femaleMounting hole spacing - 1.32" (33.5mm)