Need help finding correct parts

Hello,

I would recommend removing your pivot shoe from the window to compare to the specifications of the 15-111 shown below. This shoe is compatible with the 1/2" wide S160 coil springs. The stamp codes would correspond to the S160-4 and S160-6. They're also used with the 15-150D double support. 

Alternate image for 15-111

If you need new pivot bars as well, we would need to see yours removed from the window, along with written-out dimensions to compare to our inventory. Thanks for posting! 

I agree that the original pivot bars should work with the 15-111 as long as the specifications match but you can look over the 26-040 or 26-068 if you need replacements down the line. We'll include the dimensions from our product pages below to compare to yours. 

Alternate image for 26-040

Alternate image for 26-068

Dimensions for 26-068

As for the covers, the style of these parts can change over time but the 15-150D is compatible with the Series 160 coils as long as your window uses two on each side. The coil springs can also be used on the left or right side of the window. 

One of your coils is marked with 6.5, which corresponds to the S160-6. I can't be sure why your 4-pound coil is marked differently but it could be an older style. If you're unsure about the stamp codes, feel free to get back to us with the exact weight of your window sash, which we can use to confirm the exact amount of strength needed for both sides of the window.