This complete stirrer package includes an air drive head (model AS1AC), a 3/8" x 12" stainless steel shaft, a 2-1/2" 3-blade propeller, a support clamp (model BL415) and 24" tall mixer support stand with a 8" x 10" base (model IAX-1). The air drive head is lightweight and offers variable speed for mixing solvents or other flammable materials with less risk than electric models. The rod and ring bracket allows the user to mount the drive head on a stand when used with the support clamp. The straight coupler mounts to the motor shaft with set screws and accepts a 3/8" mixing shaft. The 1/3 HP motor provides maximum agitation when supplied with 100 PSI @ 21 CFM. See our air motor chart for performance data. This unit is rated for light usage with a maximum torque of 5.5 in-lbs. It features a Gast air motor which is known for its rugged construction and reliability. Variable speed with air motors provides flexibility for mixing in multiple applications. Air motors are also lighter weight than our electric models. Non-electrical operation reduces the possibility of explosion in a combustible environment.