Trident Marine High Pressure Gas Grill Adapter Hose easily converts gas grill or other portable LPG appliances from small disposable bottle to larger refillable cylinder. Perfect for boat (without built in LPG system), camping, picnic, etc. Fully assembled and leak tested with hand wheel POL cylinder fitting; high pressure appliance valve fitting (1? 20 swivel male with ?O? ring & check valve); and high pressure LPG hose.