Help to id spiral balance

Question

my spiral balance tubes are plastic that covers the spring and blue tip. I cut back the plastic tube on one picture. do i measure the plastic tube that goes past the blue tip or from the steel spring below the blue tip.

thanks Rich

User submitted photos of a window balance.

Paul · Accepted Answer

Hi Rich. Based on what you are showing us here, our S600-23 spiral balance with blue tip appears to be the best match for you. I do want to let you know that our balance tubes are made of metal and not plastic, such as what you are showing us. Take a look and let us know what you think.