Dixon Dix-Lock QS44 Steel Quick Acting Air Hose Fitting Socket 1/2" Male 160N. Dixon Dix-Lock QS44 Brass Quick Acting Air Hose Fitting Socket 1/2" ID Hole x 3/4" OD Male Locking Coupler 3/4" Hose OD Barbed See Pictures. Max Pressure 300 Psi It takes a minimum of 5 PSI to get a positive seal Pneumatic quick disconnects, also referred to as air couplers, are primarily used for connecting air tools, hoses, or other implements to compressed air systems. Pneumatic quick disconnects are available threaded, with a standard hose barb, or with a push-lock barb. They are also available in a variety of styles, sizes, and materials. Check out my other stores on Ebay, one of the largest inventories of "Creatology" and "Celebrate It" products from Michaels Stores more 1950's "pinup/model" pictures and Negatives. Bonanza has both my ebay stores combined into my Bonanza Booth, "DiscountCrafts4U", except the items I have listed in the "other" category on ebay that are not listed on Bonanza. Remember you can make an offer on any of my items on Bonanza by adding the item to your cart and then open the cart and click on the "make an offer" link. Be sure to check out all the freebies I have listed here on Bonanza too. My other 3 stores are: You will haft to copy paste into your browser links below http://stores.ebay.com/Stargate-Cool-Stuff?_rdc=1 http://stores.ebay.com/Debbie-Dabbles?_rdc=1 You will not find better deals for the price anywhere. I combine ship on both stores to save you money. I have great feedback - fast ship - lots of other great stuff to check out.