Top cap for sash

Question

I need new caps. I ordered new balances (2430) and have also found 24B on a balancer. I can find no identifying info on 50 year old aluminum windows. Can you identify these?  Thanks!

Jasmine · Accepted Answer

Thanks for posting. I recommend starting with our 18-199. Compare the dimensions to your existing top sash guide to confirm that this is the correct fit.

Dimensions for 18-199