Tilt Spiral Balance

Hi Grant. If the spiral balance is for tilt windows, the outer tube is 3/8" in diameter, and that outer tube is 19-1/2" long, then you could round up to 20" and use our S900-20 instead. Now, this tip actually was likely originally white, which is from an older rating system no longer used. To know what color tip to select, weigh your window sash. You can then match that exact weight with either of the weight ranges listed alongside both color tip options on the shop page.