I have a Joe Brancato Great White CF tank but also have a steel 120 cu ft tank I can fill to 3500 psi. I presently use a an adapter and yoke fitting to fill. Even though in the picture the gauge appears clear I would like to use Joe's Din 300 scuba assembly for an easier to see and more accurate gauge. My question is I see there are Din 200 and Din 300 fittings. I believe the difference is the Din 300 is for higher pressure and the Din 200 for lower pressure. The Din 200 is shorter in thread length so it cannot make a seal and be used in a Din 300. I am not sure what size fitting is on my tank but can I use Joe's Din 300 assembly on my steel 120 tank. Bill
Scuba yoke hard to read for me probably not to accurate
![](http://i558.photobucket.com/albums/ss27/mdman54/Airguns/Airguns/IMG_1098_zpsjh5ksdcy.jpg)
My steel 120 scuba tank
![](http://i558.photobucket.com/albums/ss27/mdman54/Airguns/Airguns/IMG_1097_zps4jtcbyon.jpg)
Joe Brancato Din 300 scuba assembly
![](http://i558.photobucket.com/albums/ss27/mdman54/Airguns/Airguns/Din%20300%20Scuba%20Gage_zpswgivgm2p.jpg)
Scuba yoke hard to read for me probably not to accurate
![](http://i558.photobucket.com/albums/ss27/mdman54/Airguns/Airguns/IMG_1098_zpsjh5ksdcy.jpg)
My steel 120 scuba tank
![](http://i558.photobucket.com/albums/ss27/mdman54/Airguns/Airguns/IMG_1097_zps4jtcbyon.jpg)
Joe Brancato Din 300 scuba assembly
![](http://i558.photobucket.com/albums/ss27/mdman54/Airguns/Airguns/Din%20300%20Scuba%20Gage_zpswgivgm2p.jpg)