I think he means "A" clamp or "din". You may be out of luck as he doesn't seem to know about our bottles, so i doubt he will have the converter he needs to connect to our bottles.hey
hoppfully some one will know the answer to this im hopping my local dive shop can fill my tanks for me but he said he can only use "a" clamps or "B" fittings? i think ? dose anyone one know if either of these is the one used on an air tank if not what its called?
thanks