Bob from SWISCO responded:
March 22, 2021
If by 3/8" you mean the diameter, then these are S900-30 and S900-17 Spiral Balances, respectively. The orange tip is just a faded red tip; the paler one though will need an exact sash weight. If you can't remove the sash, you can place a scale on the sill and gently lower the sash onto it. This isn't ideal, but if you're careful you should still be able to get a reading to determine what Color Tip to use. Note however that you will need to remove the sash regardless to replace the spiral balances. So long as the sash is raised a few inches and the sash is brought all the way forward, you should be able to tilt it out. Let me know if you have any further questions or concerns. |