Tom from SWISCO responded:
June 2, 2020
We should be able to help, but I'd like you to confirm the diameter of the outer tube before I suggest anything. If they're 3/8" in diameter, then you want our S900-29 and S900-25, respectively. The Green Tip option for the S900-29 carries 14 through 26 pounds, which is perfect for your sash weight. Yellow would be too strong. Meanwhile, there is no Yellow tip for the S900-25; you'd want the Green tip here once again. |