Weight stamped on coil balance

Hi there,

Thanks for posting! This does appear to be the Series 152 Coil Balance but it would help to see a photo of the compatible shoe to confirm. You'll also want to confirm that this coil is 1/2" wide.

Unfortunately, I am unable to determine from the photo whether or not the stamp on the coil is a 6 or a 9. Your best bet to confirm the correct spring strength needed for the window, would be to obtain the exact weight of the sash. If the weight is 12lbs, you'll need the S152-6 and if it is 18lbs, you'll need the S152-9.

I hope this helps!