Supports the following standards: ASTM D2419, AASHTO T176 Motorized sand equivalent shaker features two separate electronic timers (one preset at 45 seconds and the other preset at 10 minutes) to increase accuracy and ease of operation compared to a spring-type timer. It is recommended for samples in the laboratory. The consistent, repeatable oscillation of the apparatus eliminates operator-caused variation. Shaking operation delivers an 8" (203mm) stroke at a speed of 175 ±2 strokes per minute. Specifications Dimensions: 12 x 24 x 24"H (31 x 61 x 61cm). Complies with ASTM D2419; AASHTO T176. Shipping wt. 80 lbs. (36.3kg)