Spiral Single Tilt Window Balance

Thanks for posting. If the outer tube diameter is 3/8", and if this is for a tilt window, I recommend our S900-34. You will need to weigh your sash on a scale to confirm the best tip color option.

Great! Have you seen the chart on the S900-34 store page? With a sash weight of 18.6 pounds, you would want the White Tip color option. Two balances with this color option can carry a sash weight of 7 through 22 pounds.