Triple simultaneous specimen compactions are produced automatically at a preset number of hammer blows. Machine shuts off on completion. Units include mechanical compactor, automatic counter, oak pedestal and mold assembly. Overall dimensions: 16 x 22 x 66"H. Complies with ASTM D6926, D5581, AASHTO T245 and PTM705. Shipping wt. 400 lbs (181.4kg)