spiral measurements

Question

Hello,

I need to order some new 500 spirals. The old spirals no longer have a sleeve so I am unsure how to measure them. windows are 40" tall and I think I need a 38 or 39-inch spiral. Photo below. Thanks

Paul · Accepted Answer

Thanks for posting. I would recommend our S500-39 spiral balance with a 17-012 bracket. See what you think.