channel balance option

A quick learner from Washington says:
The 27" Series 380 channel balance appears to be our match. Unsure which stamp option to choose. There is no stamp on my channel balance.
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Tom from SWISCO responded:
Thank you for reaching out to us. The best way to choose the appropriate stamp option would be to weigh your sash on a scale. From there you will correspond that weight number to the sash weight range chart where you will pick the best option for you. Get back to us and let us know how you made out.
A quick learner from Washington says:
Weight in grams or oz?
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Tom from SWISCO responded:
Pounds, ideally. Or if you want to give us the measurement grams or ounces, we can just convert it!
A quick learner from WASHINGTON says:
258 ounces
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Tom from SWISCO responded:
258 ounces, or 16 pounds, corresponds to a 2630 stamp option on S380-27. Let us know if you need any more help.
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