Channel Balance Replacement

A handy person from Winter Garden, FL says:
Hi, Just moved into a new house and both channel balances on a window were removed by previous owner and are broken. Photos are attached. The original part is 29 inches long and the marking on balance is UB 28D. Also the clip at the end of the balance is gone so I don't have a photo. Would appreciate your help with identifying the replacement parts. Thank you.
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Bob from SWISCO responded:

Is the metal channel, not including the nylon fittings on either end, 29" long? If so, see either our S380-29 or S385-29. 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. For a stamp option choose 2840. 

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