Front Hydraulic Master Brake Assy with 52mm bolt spacing designed for pit bikes.Caliper installs with 52mm center to center bolt pattern.Includes hydraulic brake line approximately 1150mm in length.Compatible with M-200s front forks and Marzocchi Shiver style forks such as those on Fast ACE AS01 models.Fits a wide range of pit bikes including Stomp Demon X, WPB, Orion, M2R, MX, Thumpstar, Explorer, Braaap, Atomic, Pitpro, Pitster Pro, DHZ, SSR, Piranha and others.Package includes components as shown on product page.