identify what window Balance I need.

Question

Balance is 29" long metal only.  Channel width is .5 inch inside and .59 inch outside. channel depth is .5 inch inside and .53 inch outside. Sent a picture of top and bottom guides with measurements. Balance has '28 F' stamped on the body. (Window weighs 36 pounds. It has an ink stamp which is hard to read best guess U2  2SF or UZ 2SF or something close.  I sent a picture. Hope this gives you what you need. Thanks

Tom · Accepted Answer

Thanks for the fantastic information. Order the S380-29. Weigh very closely (if you didn't already) and choose option "2860" for a sash weight of 32 to 35 pounds, versus "2865" for a sash between 35 and 39 pounds. Your old balance appears to use the "28F" or "2860," but "2865" is stronger.