Emily from SWISCO responded:
September 19, 2023
Thanks for reaching out to us! Based on what I see here, it looks like you have either the S351-29 or S390-29 channel balance. The only difference between them is the depth of the bottom fitting as shown below. I also recommend the 2840 strength option. If you have any questions just let us know! Comparison of the S351 and S390 balance shoes.
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