1 1/4" Square Drop/Rise with 3/4" hole Size.
Available Sizes:
R125 Standard 1 1/4" Drop 3500/350 GTW/TWR125-2 Standard 2" Drop 3500/350 GTW/TWR125-4 Standard 2" Drop 3500/350 GTW/TWR125-6 Standard 2" Drop 3500/350 GTW/TW