Need new balances. Two of them

Thanks for posting. I believe the metal channel, not including the end attachments, is 14" long. Please confirm. If so, this looks like either an S351-14 or S390-14. The only difference between these two balances is the depth of the bottom nylon shoe, or the measurement from 'heel-to-toe'. See the diagram below for reference. Compare both balances with your old hardware to see what matches best. Let me know if you have further questions.

Comparison of the S351 and S390 balance shoes.

Perfect. In that case you'll need the S351-14. Let me know if you have further questions regarding the stamp option or anything else.