Based on the information you provided, it appears that you need a replacement channel balance for your window. Let’s find the exact match: CRL 27" Window Channel Balance - 2650 or 26-5: Channel Depth: 5/8" Channel Length: 27" Channel Width: 9/16" Guides Attached: No Number Stamped on Channel: 2650 or 26-5 Weight Range: 26 to 30 lbs sash weight This balance is suitable for non-tilt windows and helps regulate the operation of your window sash. You can order it through our website: https://www.dkhardware.com/27-window-channel-balance-2650-or-26-5-fa2650-product-32004.html