Speedometer = mechanical fits 85mm dashboard hole with 5/8" Thread Temperature Gauge = mechanical fits 52 mm dasboard hole with 72" Capillary Oil Pressure Gauge = mechanical fits 52 mm dasboard hole with 1/8 NPT Thread Ampere Gauge = fits 52 mm dasboard. Fuel Gauge = fits 52 mm dasboard (fuel gauge 10 - 180 ohms, for 10 -90 ohms or 90 -10 ohms leave a note along to custom change). All Gauges has Olive Green bezel with studs & brackets & 12 v illumination bulbs Thank you for your visit.