This unit enables hand-operated crimpers and decappers to function in a semi-automatic mode. It accepts most standard hand crimpers and decappers, and requires inlet air pressure of 25 to 40 psi, which may be obtained from a compressed air cylinder or your standard in-house air supply. To operate, simply insert the proper crimper or decapper for the type of seal you wish to use, and depress the foot switch. Dimensions: 19-3/4 x 6" x 8-5/8" (50.2 x 15.2 x 22 cm) Weight: 13 lbs. (5.9 kg).