Marshall Excelsior Propane Adapter Tee Model ME413. The ME413 has a soft nose P.O.L. inlet connection with handwheel which fits all standard LP gas cylinder valves. The outlets of the ME413 are both 1in 20 male fittings with valve O-ring seal and brass safety caps. The ME413 tee permits two appliances to be operated from a single fuel source. POL x 1in 20 Male x 1in 20 Male, packaged.