Caldwell 27 4 IR Replacement

A quick learner from California says:
Hello,

I have a block and tackle balance that has 'Caldwell 27 4 IR' stamped on it. The physical dimensions are:
28 inches long
1/2 inch wide
9/16 inch deep
I have attached photos that how the plastic end pieces.

Please could you help me identify the replacement part number that I need to order from you.

Thanks in advance for your help and I look forward to hearing from you.

Regards
Grant
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Tom from SWISCO responded:

Hey, Grant. Thanks for contacting us. Based on your photos and information, I think you should consider our S385-28 channel balance with a 2740 option. Look it over and let me know what you think.

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