Alside coil balance

Thanks for posting. It appears you have the 15-177 Pivot Shoe, which does interface with our Series 152 Coil Balances. To know what spring weights to select, look for stamps on the coils, usually near the tongue. If there are none or you're uncertain, give me the exact weight of the window sash and I can work out what you need. 

Coil balance systems like this are modular, meaning you only need to replace the broken components; though when some parts break, it's a sign the whole system might be wearing down and it thus may behoove you to replace everything. Let me know if you have further questions. 

For a coil stamped '6', use the S152-6 6 pound spring. We carry covers for the coil springs themselves--see the 15-143, 15-144 and 15-145, which sandwich around the coil. But I am afraid we do not carry the jamb covers. You'd have to contact whoever originally supplied the windows for this. Apologies for any inconvenience. 

If your sash is 19 pounds, then the 9 pound coil would be my pick, as well. 18 pounds of total support should be more than sufficient.

In all honesty, it's very possible your springs are stamped with 9, not 6. It can be hard to tell sometimes.