Series 351 channel balance.

A home owner from Lake Mary Fl. 32746 says:
I want to replace a channel balance with S351-22. It is marked 22d.When I try to place an order it requires me to choose option 2110,2120,2130, or 2140 before I can add to my shopping basket. I dont know what the options mean. Thanks. I just need 1.
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Donna from SWISCO responded:
For a 23" Series 351 balance, if you have a stamp of 22d choose 2240 stamp option.
If your balance does measure 22" with a stamp of 22d, please remove the window sash and place it on a scale. We need the weight of the window sash in pounds to determine the proper stamp option.

If you are unsure of the series you selected, please feel free to post some images for us to research.
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