Channel balance replacement

A quick learner from Florida says:
The metal part of the balance is 28" in length. Balance is stamped 2720. I need sash guides too. Thank you.
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Tom from SWISCO responded:

Thanks for your photos. Based on what I see here, you have either our S380-28 or S385-28, depending on the depth of the bottom shoe. That's the only difference between them. I recommend measuring your shoe and referring to our dimensions to confirm the best match.

Regardless of which balance you go with, our 18-201 top sash guide appears to match your original quite well.

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.

Dimensions for 18-201
Dimensions for 18-201

Alternate view of 18-201
Alternate view of 18-201

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