Pole Tamper Product Type Pole Tamper Sign Post Drive Size Not Applicable Blow Energy Not Applicable Maximum Blows per Minute 1 300 bpm Tool Length 60 in Valve Location Hose End Pressure Port 9/16 in - 18 SAE O-Ring Return Port 3/4 in - 16 SAE Minimum Operating Pressure 1 000 psi Maximum Operating Pressure 2 000 psi Minimum Flow Rate 4 gpm Maximum Flow Rate 6 gpm Foot Width 8 in Foot Length 2 1/2 in Tool Series H4802 Features Hose End Valve