Our size 3 reducer screw conveyor drive shaft, with a 1-1/2" diameter, is precision-manufactured from high-quality steel alloy for excellent reliability and torque capacity. This 1-1/2" size 3 gearbox screw conveyor shaft is universally compatible with all major brands of shaft-mount size 3 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!