Coil balance for silver line 1200 series double hung window

This coil housing appears to be a match for the 15-087 Coil Housing Pivot. These are compatible with the Series 180 Coil Balance. Since your housing is marked with a 7, you'll need the S180-07.

Be sure to double check the window to see if the coil brackets or the pivot bars need replacing as well.

Detail of 15-087