The Blastcrete Model H 020 is our simple hydraulic rotary gunite machine attachment that is variable speed from 0-5 cubic yards per hour. This machine is equipped with the proven Genuine Piccola single point clamping system and offers precise material output control. The hydraulic requirement is 10 GPM @ 1500 PSI and is universal with any hydraulic power unit with this capacity. Since this is a hydraulic machine, the air requirement is only 225 CFM.