Bob from SWISCO responded:
May 26, 2021
Hello there. Without pictures I can't be certain. Do you mean to say that both the top and bottom fittings have wings, or just the top fitting? If both fittings have wings, and the metal channel alone is definitely and exactly 28" long, then you probably need either our S380-28 or S385-28. The only difference between these two balances is the depth of the bottom nylon shoe, as depicted in the image below. If, however, only the top fitting has wings, then you likely need the S395-28. Compare all the specifications to confirm. In any event, for a stamp option you'll choose 2730. Let me know if you have any further questions. Comparison of the S380 and S385 balance shoes.
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