Replacing spiral balances. Tip color recommendation?

I'm replacing spiral balances in my builder grade windows. They're non tilt single hung sashes. I removed the existing balances and the tube measured 30" but they have no color coding. I stuck a scale below the sash and lowered it to get a weight estimate and it came out to be 23 lbs. The width measures 3/8". I'm guessing the S400-30 green tipped balances would be the best match? Pictures attached of the old balances and the bracket in the track.

Any advice is welcome!