Horizontal, vertical and tapping motion are uniformly reproduced for assurance of accurate and dependable tests. Sieve action is produced by spring loaded tie rods. Shaking and tapping is accomplished with a specially designed mechanism. Capacity: Up to 10 full height 8 inch diameter sieves plus pan and cover. Includes 3-wire cord and plug, feed through switch and 30 minute timer. For 110V, 60 Hz, single phase.