I have 3 different Channel Balances. All 3 have the same top and bottom plastic ends. The same metal hook. They are 1/2" X 5/8".
#1 has 21C stamped on it. It is 22" long.
The spring connects to the hole 20 5/8" from the bottom.
#2 has 27C stamped on it. It is 28" long.
The spring connects to the hole 24 7/8" from the bottom.
#3 has 27C stamped on it. It is 28" long.
The spring connects to the hole 26 5/8" from the bottom.
The SHOW US won't let me upload any more of the photos I have.
Thanks, David