Casey from SWISCO responded:
August 15, 2019
Hi Jerry, With this combination of attachments, you could have either an S380-35 or S385-35 channel balance. You need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment. You'll also need to choose your spring strength option based on the stamp on the back of your metal channel. Thank you and let us know if you have any other questions or concerns. |