Nitrous Express 11152 Nitrous Bottle. WARNING CA Proposition 65: Yes.Less Than Old Style Brass Valve. 4AN Default- 6AN or 8AN available on request. The lightest nitrous bottle on earth! Imagine a 10lb capacity nitrous bottle that weighs only 17lbs full of nitrous, that s a 7.5 lb. Savings over a standard 10lb bottle! Wow, how do I start to tell the world why NX is different and better than any other company? NX copies no one; we lead the industry in technology and innovation; Never be satisfied with the status quo; Always give the customer more than he expects!