You Are Looking at A Vacuum Bag Fitting Adapter Port for vacuum bagging. FEATURES: Straight solid brass structure with 1/2 multi Barbed connector to hose/tubing, no restriction with 1.6 inch over all height with matching rubber washer sealer and sealers needed for a tight connection; with matching large SS washer with bigger contact area to protect the film forming the bag Sold as one assembly unit Recommended Deep Vaccum Pumps: VPD6 Or, VPD12a depends on your bag size. Packing List: Brass adapter with 1/2 multi-barbed connector and hex stopper, one unit Black round rubber sealer, 0.54 inch ID, 0.79 OD, one unit Stainless steel washer, 0.65 inch ID, 1.17 OD, one unit Brass locking nut, 3/8 NPT, one unit all the above parts are assembled together and packed in one unit Display pictures bellow explained: First: applied to a transparent bag, top view: Second: Parts view, in the order it is applied, bagging film should go between the 2 washers. Third: Side view when assembled. 4th: 2 units showing different angle views. 5th: Applied to a transparent bagging material, bottom view. Add a map to your own listings. FREE Trial!