Looking for this part in my window

Hello there. It's a bit tough to tell without seeing the system removed from the window, but I believe that's a 15-228 Pivot Shoe, which commonly uses the 1/2" thick Series 160 coil balances. You'll need to remove the old hardware from the window and measure the thickness of the old coil tape to confirm. If it's a different thickness, such as say 3/8" thick, let me know. Also, I would like the weight of the window sash that these coil balances support just so we're certain of the spring weight (or coil spring strengths) you need. The video below shows how to remove and replace coil balance assemblies similar to this. Take a look: