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S350-20 20" Series 350 Channel Balance

I bought several of these windows in the early 80s from a business that is now out of business. Can you help me with some balances

Can't find the correct stamp no. My is 20in block and tackle non tilt with a stamp no. 36 48 What do I need Thanks

I live in Vancouver British Columbia I'm wondering if there's somebody here to get these tracks or can I order them through you and have them delivered they are 20 inch channel ballots

I have to replace the channel balances on a few of my Fiberlux non tilt vinyl windows. I measured the balance to be 20" as you showed in the video. The search showed the replacement to be a 20" Series 350 balance. My balance has a 19 D stamp on it and I'm not sure how to figure the sash weight in o ... (cont.)

The cord broke on one of my balances for the single hung 4 x 4 window in my kitchen. The markings on the balance is... 19 5 FR Caldwell.... The metal channel is 20" long, 5/8" deep and 1/2" wide (approx) It looks like your model S350-20. Can you tell me if this will work...if it will I will order ... (cont.)

I need some 1/2" Wide Channel Balances series 350 i think, so i am sending some photos just to be sure. On the metal channel that is exactly 20" long measured, there is "19B" inscription. If i refer to the 350 series it should be 19xx option number 10 20 30 or 40 is that number the spring strength ? ... (cont.)