31 5 dc cmc 7 32 inch balances

Hey, thanks for reaching out! This is certainly something we can help with, but we'll need more information still. The number you provided only identifies the spring strength, so we'll need to see the top and bottom nylon attachments to identify the series of balance you have. 

With this combination of attachments, you could have either an S380-32 or S385-32 channel balance. You need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment. You'll also need a 3150 spring strength option

Thank you and let us know if you have any other questions or concerns.

Comparison of the S378, S380 and S385 balance shoes.