Searching for Sprial twist window balancer blue tip1/2" diameter 17" long

Thank you for reaching out to us! Our Series 900 and Series 600 are the only spiral balances we sell for tilt windows. The S600 has an outer tube diameter of 9/16" (considered 5/8" in the trade) and the S900 has a 3/8" diameter outer tube. We recommend you double-check your measurement just to be safe! 

If the style of your balance differs from these Series, we will need to see photos of your original assembly removed from the window.