ITEM NAME:Brake Master Cylinder for 80t Trailmaster 6.5hp MID XRS XRX Description: Material: 6061 Aluminum This master cylinder has one port for the rear brake caliper Overall length of the base : 4 1/4" The mounting bolts spacing : 1 3/4" Fitment: for 80T Trailmaster Mid XRS XRX Go Kart Package Includes: 1 Piece Brake Master Cylinder.This master cylinder has one port for the rear brake caliper. 1 Piece Brake Master Cylinder. Material: 6061 Aluminum.