3-1/8″ TSO’D std unlighted 3-pin turn coordinator for altitudes from -1000 to 35,000 ft. Operating temp: -30°C to +50°C. 12-32VDC. 0.35A power draw. Wt: 1.2 lbs. New installations require MS3057-4A clamp & MS3106A-10SL-3S plug (not incl). Electric Gyro Corp.