I have a 150 unit apartment complex with Gorell windows and we are running out of springs. Since they are no longer in business i have had one heck of a time trying to find parts. I have found all the balance parts I need on here but i'm not sure what lb spring I need. On the coil I have now it has 5FD stamped on it, so I assume I need 5lb but i'm not sure. How would i get this info so that i buy the right one? Also do they come all together like in the picture I provided or do i have to put them together myself?
