Check the listing for details. 15947 Nitrous Express Bottle Insulated Jacket for 2.5 lb Nitrous Bottle. Color: Black, Condition: New. Listed at 67.05 USD. 15947 Nitrous Express Bottle Insulated Jacket for 2.5 lb Nitrous Bottles Description: These high-tech bottle insulators are the perfect winter or summer addition to the NX nitrous system. In the winter they keep the bottle pressure stabilized by preserving the heat, in the summer they insulate to keep the sun and excessive ambient temperatures out. Whether it's heat you want to keep “in" or “out" the NX bottle jacket is the answer. By using this bottle jacket you will find it is a lot easier to maintain a consistent bottle pressure and it also improves the performance of the automatic bottle heater.Nitrous Bottle Not Included Shipping is FREE inside the contiguous United States. If shipping to Alaska, Hawaii or Puerto Rico please message us for a quote for additional shipping costs.