S & K Predator Guard for 2-3/8 and 1.9 Inch Diameter Round Poles Ensure safety for your Purple Martin friends Deter pesky squirrels and other predators from climbing your pole Made specifically for RP19 or the EzLift 2-3/8" Pole Measures 14 inches tall with the top width 1-3/4 inches and the bottom width 11-1/2 inches For use with a 2-3/8" and 1.9" diameter Round Poles