WE WANT TO PROPERLY SET YOUR EXPECTATIONS: The threads on these oxygen compatible valve outlet inserts are oxygen clean copper metal alloy (aka "brass") which exhibit some discoloration that is NOT aesthetically pleasing as chromed brass finishes typical of most SCUBA valves.
Use this Oxygen compatible insert to convert our DGX Premium O2 valves 200-BAR DIN style SCUBA cylinder valve for use with a yoke style first stage regulator. It is a raw brass insert without chrome plating.
According to our suppliers, these products are constructed with oxygen compatible materials and factory cleaned for use with compressed gases in excess of 23.5% oxygen. Nonetheless, the 'clean state' of this equipment applies only prior to initial use. Thereafter, periodic inspection and cleaning are a necessity. You must meticulously follow the recommendations of the US Department of Transportation (DOT), Compressed Gas Association (CGA), and other federal/state/local agencies, plus your dive training agency for equipment maintenance, handling, storage, labeling, filling, transport and use of compressed gases. Oxygen-related fires and explosions can result in serious injury or death. Ultimately, you must make the final decision to assume all risks associated with the use of any compressed gases, including those in excess of 23.5% oxygen.