AutoMeter Auto Meter 200774-33 Ultra-Lite Gauge, Vac/Boost, 2 1/16", 30Inhg-20Psi, Mechanical, Marine Silver Features Front Sealed Bezel Design For Added Water Resistance And Up Protected Paint On Dial Pointer For Added Protection Against Sun Damage Requires AutoMeter 3223 nylon tubing kit (10 ft.) to connect from gauge to pressure source (sold separately) - Marine parts distributors may also offer their own tubing solutions Gauge kit includes bulb and socket assembly, red and green bulb covers, corrosion resistant mounting hardware, and detailed instructions for installation