Brake unions

whats the larger one on the bias valve.. i've ordered the wrong ones twice, and when i popped to the local motorfactors he sold me the wrong ones too.. he was so sure about himself i didn't even check..

so, im not going out to the motorfactors again as i wasted a trip already and i refuse to make another..

the reason my last ones where wrong was the middle bit was too big, but the thread was spot on..

who knows what it is (not a guess) and better yet can you link me up.. :)

i did a search for some threads but i still managed to go wrong so here we are:ashamed:its these little things that really start to make my pi55 boil so please help a brother out:D