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The Stay-Longer Propane Kits are designed to give you new flexibility on how you use your LP-Gas. You can stay longer by hooking up auxiliary LP-Gas cylinders, or you can tap into the RV's LP-Gas system to fuel portable high-pressure appliances. MER473 includes Brass tee connection (ME420) .9 GPM excess flow male hard nose POL x female POL x 1"-20 male x 1/4" female inverted flare, 5' hose (MER401-60) .9 GPM excess flow male hard nose POL x 1/4" male inverted flare, and 12' hose (MER421-144) 1"-20 male x 1"-20 female