I have two 225 bar DIN Dive Gear Express cylinder valves. Left & right. Right valve is an Oxygen valve, left is an air/ Nitrox valve, non modular. Boxes have been opened, but packing never opened. Brand new valves, never used. I was going to use them for configuration changes to my rebreather, but didn't need them (I had bought 2 sets). The open set is only for demonstration of what is in the boxes & not for sale. I will sell the valves together for $80+ S & H or separate for $40 each + S & H.