Our size 2 reducer screw conveyor drive shaft is 1-1/2" in diameter and precision manufactured from high-grade steel alloy for maximum reliability and torque capabilities. This size 1-1/2" size 2 gearbox screw conveyor shaft is universal for all major brands of shaft-mount size 2 units! For additional information or to get a quote on our premium screw conveyor drive shaft, contact our customer service team, and we will gladly assist you!