Window balance

A quick learner from Sarasota fl says:
Part # 2330. 24'' long I need 2 pieces

Part# 2930. 30" long I need 2pieces. the plastic ends are the same as part # 2330 Photo included
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Bob from SWISCO responded:

These balances appear to be either the S380-24 and S380-30, or the S385-24 and S385-30, respectively. The only difference between these two balance Series is the depth of the bottom nylon shoe, or the 'heel-to-toe' measurement. See the image below for reference, and compare both with your old hardware to determine what you need. Let me know if you have further questions. 

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