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S377-13 13" Series 377 Channel Balance

the number on my old part is 1220 measurements for metal part only.... not including the plastic : 12 1/2 inches long 9/16 wide

Hello, I need 4 window balancers each 12 1/2 in long with the code 12 10 Attached is a photo

Hello, I need your help rebuilding three no tilt windows 2 Big windows have the balance with the 2020 and the U-Channel is 31" in length is 31"1 Small window has the balance with 1220 and the U-Channel is 12" in length Windows are very old, so please include all the parts needed to rebuild the 3 win ... (cont.)

Hello, the window balance is 12.5" long X 1/2" X 5/8" It has stamped 12-1 W as you see in the attached photo. Please let me know which part number should I order. After searching your website I think that the S377-13 is the correct one. Please advise! Thank you, -John

Please help me identify a 12-5/8" x 1/2" no-tilt balance stamped with 12-10. It appears to have a 19-005 top and a 15-004 bottom.