Three post brake light switch. Screws directly to stock master cylinder including the type 2 dune buggy master cylinder. These control the turning on of the brake lights when pressure is applied to the brake system. Will screw in metric and 1/8 inches npt pipe thread Beetle Type 1: 70-79 Bus Type 2: 70-79 Ghia: 70-74Brake Light Switch 3 Post Fits Beetle Bus Ghia & Buggy