MODEL 70 END TAPPED VIBRATOR: End tapped with inch or millimeter thread for attaching to threaded rod or stud. Model 70 can be supplied in many variations; silent (air cushioned) or impacting (piston hitting end cap) with exhaust port for attaching a muffler or air hose to lead off exhausting air. The all steel construction assures long life. Model 70 is an inexpensive solution for moving material in small bins and hoppers as well as screens and small feeders. Force and frequency will vary with air pressure. S – for Silent Units and EM - if Exhaust Manifold is required.  All VIBCO Piston Vibrators require lubricated air.