Need two new balances

A home owner from California says:
number posted on side 1513 HC BSI. Want to make sure I get the right ones. I also need the clips that hold the balance in place on the top, I broke one when I was removing them. The balance is 16 inches long. Thanks for your help

Jeffrey
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Paul from SWISCO responded:

Thanks for contacting us, Jeffrey. I see that you were looking at our S350-16 channel balance as a possible replacement for your part. It does show similarities to yours. Carefully compare your nylon attachments to ours to confirm this is a match. As for the option, since your stamping does not correspond to any of our options, the only way to choose the most accurate option would be to weigh your sash on a scale and correspond the weight number to the sash chart located on the product page. If you should have any further questions, please let us know.

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