Paul from SWISCO responded:
August 21, 2014
That top sash guide looks like our 18-166, though I cannot identify what your balance is. In the past, Milgard has used our Series 385 channel balance, but there is no guarantee that this is what you have. Do you have any old balances handy?
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Paul from SWISCO responded:
September 11, 2015
Thank you. Yes, this is either our Series 380 or Series 385 channel balance. You will need to carefully measure your bottom nylon shoe to determine which is better (the size of the shoe is the only difference between them).
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