Kesington Window Balancers

Hello, thank you for posting,

Please review the style of the 15-177 pivot shoe that is compatible with the Series 152 coil springs. Compare the dimensions below to confirm a good fit! 

Alternate image for 15-177

Match up the number markings on the original springs to confirm the weighted option needed. If you need a new cover, see the 15-143 bushing, 15-144 bushing cap and 15-145 support barrel. Let us know if you have any additional questions!