GlowShift features a 3/8-18 NPT Weld-In Aluminum Bung Set, available in packs of 2. Bungs are typically welded into a tank assembly and are tapped to accept common fittings used on fluid containers. GlowShifts bungs are machined from solid aluminum and drilled and tapped to 3/8-18 NPT. These premium-quality bungs have a brilliant finish and can be used for Intake Temperature and Intercooler Temperature Sensors. Sized to fit your fabricating needs, theyre also ideal for oil or fuel tanks, radiators, valve covers and manifolds. GlowShift includes installation instructions, free lifetime technical support and a one year limited warranty with each purchase.