Direct factory bolt on. Mounts in same position as original and uses all original brake line hardware.
Color may be different from your original, but same part number.
51mm Bolt spacing center-to-center on the mounting plate.
This is a common fix for front brakes on your Apollo dirt bike that may have stopped working. Often times pressure will be low or absent completely, which is due to caliper seals no longer working. If you see brake fluid leaking from the caliper, inspect the brake line first, but most of the time this replacement will do the trick!