OxYgen regulator 0 300 PSI 0 4000PSI NOT FOR TANKS 20665

  For sale is a Oxigen regulator; 0-300 PSI; 0-4000PSI; 
  Notice. Pic.4 - This inlet has counter clockwise threading.

  Also please note that it definitely does NOT fit regular 
  oxygen tanks, it is for something else.

(Click on the thumbnail images to enlarge)