Coil balance spring

Question

Could you please help me to find correct stamp on swisco 170 in picture? I believe it is swisco 170 coil balancer. The weigh of window sash with glass is 18.8lbs. Thank you in advance.

Jasmine · Accepted Answer

Hey there,

Thanks for posting! Based on the weight of your sash, the coil spring you need would be the S170-409, which is a 9lb coils. Two coils, one for each side of the window, will support the weight of your 18lb sash.

I hope this helps!