• Oil tight, rain tight, submersible • UL certified for outdoor applications • Install with fingertip pressure, no tools • Fit trade sizes 1/2", 3/4" and 1" NPT • Lock firmly in boxes .030" (0.8mm) to .125" (3.2mm) thick. • UL and CSA • Made from Neoprene • Flammability rating: 94V-0