My dealer told me that the T/S of either the 12G350 and the 12G125 are comparable with the 12G320, so the first T/S I supplied you is for the 12G350 and the next one is for the 12G125, but recently I saw the T/S of the 12G320 in a european site which has a qts of .18 but I am not absolutley sure if this is correct or the official specs. I have really no idea, our local dealer can't seem to get the official specs from Beyma for some reason. I'll get back to you when I have more news from my dealer