order for channel balance

A quick learner from Guerneville, CA says:
October 4, 2018
Here is the number on the original channel balence: 17-3 FA2 CMC 9. It is 18 inches long. We can't tell whether we need 385 or 380. Thanks
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Tom from SWISCO responded:
October 5, 2018

To tell the difference between Series 380 and Series 385, first check the top and bottom attachments for plastic wings. If the top is 19-005 and both sides have wings, you're on the right track.

Then, check which of these bottom attachments you have. If it's 1-3/32" in depth, choose S385-18 (1730). If it's 1", choose S380-18 (1730).

Comparison of 15-004 and 15-005
Comparison of 15-004 and 15-005
18" Series 380 Channel Balance
18" Series 380 Channel Balance
S380-18
$9.34
18" Series 385 Channel Balance
18" Series 385 Channel Balance
S385-18
$9.34
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