The DIY Gas Tank Fuel Sight Gauge Kit from Lowbrow Customs. What makes our kit different than others available? Start with the smooth 90 degree fittings, chromed brass, 1/8" NPT x 1/4" hose barb, made in the USA. Mild steel tophat 1/8" NPT bungs, easy to weld, drill a 5/8" hole and drop them in and they held in place perfectly by the flange. Stainless steel hose clamps with stainless screw, made in the USA, and then polished to a show quality finish. 10" of high-quality 1/4" ID polyurethane clear fuel line, this is very flexible and has excellent fade and abrasion resistance.