This is a NX High Flow Nitrous Bottle Valve with a Siphon Tube for a 10 lb. bottle.   Includes the neck O-Ring. Slightly used; nice shape-------------guaranteed 100% functional and leak free.    Fixed shipping of $10 via USPS Priority Mail.     See my other auction items for more good deals on nitrous and hot rod parts-------------you may also call the shop at 702-596-2616 with questions.