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S390-36 36" Series 390 Channel Balance

The measurement from metal end to metal end is 36" Although the stamp shows 35

Hello. I am looking to replace a a block & tackle balance for a non tilt window. the balance is 9/16 wide. and measures 36" I believe it may be the series 390 channel balance. the bottom shoe is 1 1/8. It has a stamp on it 35-2 (is this the sash weight? I don't know (pictures enclosed) Thank You ... (cont.)

Marking on Seasonshield window: 35 5 IW CMC 11 36 in length channel 1 in bottom piece

I already purchased (2) S390-36, option 3510, but this won't hold the window up. I thought the 9 was the weight of the balance. I recently found out that the sash might weigh 40-50 lbs.

need two and was wondering what part number I need.

Please, send a quote and availability for: Series 390 Block & tackle Balances: Qty Stamp 100-# 3460 100-# 3570 100-# 3660 100-# 40DS41

36 inch metal part Sorry email was wrong on previous email

I've determined I have the Series 351, 36". However, the stamp option is 3590 which is a stronger spring than appears on the chart.

I need two 36" marked with number 3530 I will try to enclude pics I can not install but your videos explain well hopefully I will be able to find someone who can. Also I can not find markings for who made these old windows and I'm interested in new screens any idea where I go for those Thank y ... (cont.)

each piece is 36 inches long 3540 is engraved on end as seen in photo

I've been purchasing 390 series replacement balances from Swisco for my non tilt PGT Thermopane (double thickness glass) windows and they work fine.I am about to order some 36" (metal channel length) balances for a wide window. The sash weighs approx 45 lbs.However your chart for this balance does n ... (cont.)

Balancer replacement

I need to order 12 window channels. I believe it's the 36" Series 390 Channel Balance with 19-002 top and 15-001 but I would like your advice. I've attached photographs, also the metal part is 36" long and is marked "35DS".

I have two different types of balances that I need to replace and I am having a tough time identifying them. What I do know: Balance A Width: 9/16" Depth: 5/8" Channel Length: 37" Stamped on end: 36 B B.S.I. Balance B Width: 9/16" Depth: 5/8" Channel Length: 36" Stamped on en