replacement balancers

A home owner from Cape Coral, Florida says:
each piece is 36 inches long
3540 is engraved on end as seen in photo
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Bob from SWISCO responded:

Hello there. This looks an awful lot like either an S351-36 or S390-36. The only difference between these two balances is the 'depth' of the bottom nylon shoe, so compare both with your old hardware to see what matches best. You will need a stamp option of 3540.

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