Kermode Concepts Extension / Gas through, asa to asa and asa to 1/8th npt. 1/th npt female to male asa and female asa to male asa combined together. Includes one of each. Combined makes a compact gas through, roughly 2 inches. Width is a little less than inch and a quarter (1.11 inches). Multiples can be combined together. No pin in female asa to actuate tank valve. Some wrench flats line up and some don't when screwed together. Most wrench flats are slightly off set when combined together. Clear anodizing, flat wrench slots, sleek looking, new. New but have been sitting for the last 15 years. Look great.