See pic 29 4 BSI

Hello, thank you for posting,

With this combination of attachments, you could have either an S378, S380 or S385 channel balance. You’ll need to measure as shown below. The main difference is the depth of the bottom shoe. 

Please compare to your original to confirm a good fit! You will need a 30 inch channel with a 2940 stamp option. Let us know if you have any additional questions. 

Comparison of the S378, S380 and S385 balance shoes.