This is the Poseidon Cylinder Inversion Kit Features: LP Diluent Miflex Polyurethane Hose, 300 mm/11,81 inch LP Diluent Miflex Polyurethane Hose, 380 mm/14,96 inch HP Diluent Miflex Polyurethane Hose, 300 mm/11,81 inch Splitter with 1 inlet and 4 outlets (with one plug) LP Oxygen Miflex Polyurethane Hose, 700 mm/27,56 inch HP Oxygen Miflex Polyurethane Hose, 300 mm/11,81 inch + packing For technical rebreather divers who want to invert their gas cylinders. If you wish to advance into technical rebreather diving, many dive organizations demand that you have an inversion kit for your cylinders allowing you to turn valves on and off manually on your rebreather. Poseidon has therefore developed our own Inversion Kit with Poseidon quality. All hoses are made out of Miflex Polyurethane, which are robust and durable. The splitter has 1 inlet and 4 outlets, where one of the outlets has a plug if you don&';t have to use it. If you want to use the Inversion Kit, it is a good idea to have cylinder valves that have 90 degree angles so you can access them easily by hand.