Features: , Application: Filling Cylinder Accessories, Compatible with PCP Air Rifle, Air Rifle, Paintball Foster, Paintball Tank and SCBA Tank Filling etc. The male to male curing device allows air to be transferred from one tank to another when used with two filling adapters. This is helpful if you're trying to move air from a large bottle to a smaller portable bottle. Simply connect each filling adapter to the male to male connector. This is also helpful for SCBA tank filling, but the person trying to fill the tank does not have an SCBA filling adapter to connect to the bottle. In that case, you may want to ask if they can use paintball aquarium accessories for refueling. Then simply connect the male to male filling adapter to the end of the filling adapter (if the pressure rating is 4500 psi) and then connect them to the filling container. Product Parameters:Material: Stainless SteelRated As: 4500 psiSupporting Male to Male ConnectorQuick Disconnect AdapterSuitable for 8MM Female AdapterWidth: 12mmLength: 29mmType: Double Male Filling Nipple, Quick Disconnect Packing List:1*8mm Double Male Quick Disconnect AdapterNote:1. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.