Tom from SWISCO responded:
May 26, 2017
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.
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Tom from SWISCO responded:
May 26, 2017
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.
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