Co2 Tank Cga-320 Nut Regulator - Carbon Dioxide Bottle Threaded Receiving Washer ?.The material is brass, environmentally friendly and durable. ?.Widely used in CGA320 paintball CO2 gas tank, soda water CO2 gas cylinders, CO2 gas welding equipment, gas cylinder gas conversion and so on. Product Features ? Nut Internal Thread is Suitable CGA-320 CO2 Gas Tank, Male Thread On The Nipple Is 1/4" Npt. (Right-Hand Clockwise Tightening). ? Gasket is used to reduce pressure to prevent the nipple from damage and to ensure air tightness. ? Can assist you to add a small 5# CO2 tank from the larger 20# CO2 ? Includes Washer x2, Nut, Nipple. ? Material: Solid Brass. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!