Tom from SWISCO responded:
May 11, 2018
Your stamp may indicate our S180-6, yes. If you weigh your sash you can confirm with a little math. Basically, one S180-6 on each side would carry a 12 pound sash, two on each side would carry a 24 pound sash, etc. So if you weigh your sash and it matches that pattern then you should be good to go. I'm afraid there is no stronger version. Coil balance manufacturers pretty much only make one type. |