Stainless Steel Square Tank with Lightnin Mixer- 300 Gallon. Material of construction: 304 SS. Inside straight-wall dimensions: 3 ft. 6 in. L x 3 ft. 6 in. W x 3 ft. 6 in. H. Manway diameter: 18-1/2 in. (2) Sight glasses: 13 in. L x 3-1/2 in. W. Lightnin Mixer, Model: ND-3, S/N: 6311236, motor specifications: 1 hp, 1730 rpm, 208-230/440 V, 3.2-3.2/1.6 amps, 60 Hz, 3 phase. Shaft dimensions: 1 in. dia. x 4 ft. 6 in. H. Top propeller diameter: 6 in. Bottom propeller diameter: 14 in. Inlets: (2) 2-1/2 in. dia. FNPT fittings. Outlets: (1) 2-1/2 in. dia. FNPT fitting. Overall dimensions: 4 ft. 2 in. L x 3 ft. 6 in. W x 8 ft. 3 in. H.