Stamp option for 2220B

A quick learner from Indianapolis says:
Stamp option on existing is 2220B. Which option is best replacement for 22" Series 351 Channel Balance
Product Code: S351-22.

Thank you
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Tom from SWISCO responded:
I would confirm the length of your metal channel. With a stamp of "2220," it should be 23" long, not 22".

If it is 23" long, we of course recommend the 2220 option.
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