Stainless Steel Single Shell Tank With Lightnin Mixer. Pneumatic Mixer Model: XDA-33, S/N: 89/525043-01, 1/3 hp, air pressure: 60 psi. Gear driven for maximum output torque, propeller diameter: 4 in., shaft: 15-1/2 in. Pneumatic mixers are safe for use in flammable or explosive environments. No heat build-up. Motor operates spark free. Speeds can be varied by means of the air control valve. Motor designed to handle stalling overloads without burning out. Lightweight makes for easy handling. Tank capacity: 18 gallon. Tank inside dimensions: 15 in. dia. x 23 in. H. Inlets/outlets: (2) 2 in. threaded female, (2) 2-1/4 in. threaded female. Overall dimensions: 24 in. L x 20 in. W x 39 in. H. This piece is being offered and sold as is. It may or may not leak or be complete. Please be sure and look at pictures and ask for additional pictures. Do not rely on original descriptions. MAKE US AN OFFER. NO REASONABLE OFFER WILL BE REFUSED.