Having trouble identifying my balance ends

Stamp = 3330
Channel length = 34"
Channel width = 9/16"
Top end is flat and is winged
Bottom shoe depth = 7/8
Bottom end is also winged
Based on the catalog, my best guess is: Series 371 with the 19-031 top and 15-005 bottom.
https://www.swisco.com/34-Series-371/pd/Series-371-Channel-Balances/S371-34





How do I measure for the correct channel length without the original window balance?



So what you want to do is measure the visible glass height in the sash and then add 1". So if the visible glass is 15" tall then you would get a 16" long balance. We will also need you to weigh the window sash and tell us the precise weight since the balances are missing. The weight will tell us how to re-calibrate the replacements.

Visible glass height = 27"
Window Balance length = 28"
Sash weight = 17.8 lbs.



Thank you! Just let me know when you determine the quantity you're looking for and I can get the ball rolling!




Thanks so much for confirming that for me! What I will do now is email you a purchase link and price quote for (2) 28" long balances and (4) 34" balances with the 19-037 top and 15-029 bottom fitting. The 28" balances will have a 2730 stamp for a sash weighing 13 to 19 pounds. The 34" balances will have the original 3330 stamp. You can use this link to place an order right on our website. Please note, the 16-002 can't be included in this link so don't forget to add the desired quantity to your cart separately!
If you have any questions just let me know!

The entire process is/was much simpler than I really expected.



We appreciate your business! I'm glad to hear you had a good experience with us. Please let me know if I can be of further assistance and good luck with the repair!