Window Channel Balance

A quick learner from San Diego says:
Your website recommends the S385-26 for my replacement, but I am unsure of the stamp option. The print on mine is 25 5. Should I assume I need the 2550 option. My window is a metal frame 32x30" with double pane glass.

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Tom from SWISCO responded:
Yes, a stamp of 25 5 usually corresponds to our 2550 option. You can always weigh your sash to confirm.
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