replacement for tension spring lower sash right side

Thanks for posting! Silverline uses a combination of the 15-087 pivot shoe and Series 180 coil spring. Please review these parts to see what you think. Note that you will need the spring code number when ordering, which should be printed on the band of your original. Finally, you might also need 16-024 mounting bracket if yours is broken. It can be reused if it's still in good condition, though.