6 Volt Vintage Style Tachometer MADE IN THE U.S.A. !! WORKS IN AUTOS, TRUCKS, AND MARINE VEHICLES ALL METAL 360° UNIVERSAL MOUNTING CASE SOFT GLOW LIGHTING STEWART WARNER BEZEL WITH DOMED GLASS EASY HOOK UP FOR ALL ELECTRONIC & CONVENTIONAL IGNITION SYSTEMS POS/NEG EARTH HEAVY DUTY CROSS COIL METER MOVEMENT AVAILABLE IN 4,6,AND 8 CYLINDER (PLEASE SPECIFY AFTER PURCHASE) SOME VEHICLES MAY REQUIRE A UNIVERSAL TACH ADAPTER FOR MAGNETO SYSTEMS Http://www.ebay.com/itm/272378999913?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649