GlowShift’s 1-1/2” Liquid Filled Black Dial Mechanical 15 PSI Fuel Pressure Gauge is the perfect monitoring tool for your carburetor vehicle. This mechanical gauge reads from 0 to 15 PSI and installs directly to the fuel system under the hood with the included 1/8-27 NPT thread attached to the back of the gauge. Each gauge is liquid filled with silicone oil that helps protect the needle from the powerful vibrations of the engine, giving you the readings you’re looking for. Housed in a waterproof, chrome body, this gauge is built to last. This gauge features a sleek look with a black gauge face, a white needle and a clear lens to easily view the fuel pressure readings. The included brass 90 degree thread fitting helps reposition the gauge in the engine bay to a more accessible angle, if needed. The gauge's body features an outer diameter of 1-3/5" (40mm) and gauge's bezel outer diameter of 1-3/4" (45mm). GlowShift includes installation instructions, free lifetime technical support and a one year limited warranty with each purchase.