Aguas

Hello, thank you for posting,

It appears the window uses an older version of the 15-180 pivot shoe that is compatible with the Series 190 coil springs. Please review the dimensions below to confirm a good fit!

Alternate image for 15-180

The original coil(s) should be stamped with a number that indicates the weighted option needed. If there are no markings, please provide the weight of the window sash for further assistance. Thank you!