Brake light switch kit. Works perfect for the master cylinders that don’t have the port at the bottom for the brake light switch. Comes with tee, custom made brake line part number PBS-1 (1/2" and 3/16" brake nuts, double flared) , one 3/8” brake nut and a brake light switch part # 931216. This kit works on the port of the master cylinder going to the rear wheels. Designed to work with our master cylinder part number 2912H (sold separately).