need window channel balance for upper sash

A handy person from 48455 says:
only marking on balance is 28HD. overall length is 29 inches, plastic clip for that hold pin on window is broken. Need a left and a right
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Casey from SWISCO responded:

Hello,

Take a look and compare our S751-29 channel balance with a 28HD strength option to an undamaged assembly. Thank you!

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