WINDOW COIL BALANCES

You'll need the 15-087 Coil Housing Pivot to replace your existing housing. To confirm that this is the correct match, carefully look over the dimensions below and compare them. 

It uses the Series 180 Coil Balance. Since your housing is marked with a 7, I believe you need the S180-07.

The mounting bracket is the 16-024.

Detail of 15-087