Need replacement

If you are measuring only the metal channel at 29", then I think you'll want to look at either our S380-29 or our S385-29 channel balance.The difference between the Series 380 and Series 385 balance lies in the shoe.

Comparison of the S380 and S385 balance shoes.

The series 385 balance has the 15-004 shoe which is slightly larger from front to back, as illustrated. Once you have determined which series you need, look for a number printed on the channel that indicates the spring strength. Let us know if you have questions.