Need new

Hello, thank you for posting,

Your pivot shoe resembles the 15-111 that is compatible with either the 1/2" Series 160 or the 3/8" thick Series 165 coil springs. Please review the dimensions below to confirm a good fit! Compatible covers can be viewed on the coil series page. 

Alternate image for 15-111

The coil springs should have a number stamped on them that indicates the weighted option needed. If there are no markings, please provide the weight of the window sash and the thickness of the coils to move forward. Thank you!

To move forward, can you confirm the thickness of the coil spring? It should either measure 1/2" or 3/8" thick. Please also provide the weight of the window sash to move forward. The sash will need to be removed and placed on a bathroom scale. Thank you! 

Thank you,

For a 15.6 pound sash, you can stack (1) S160-03 and (1) S160-04 spring with the 15-150D support on both sides of the window. 

Let us know if you have any additional questions!