Engraving Pen, Product Type Engraving Pen, Duty General, Maximum Strokes per Minute 13,000 stroke/min, Required Pressure 90 psi, Air Consumption 1 cfm, Air Inlet Size 1/4 in, Air Inlet Type NPT, Minimum Hose Size 3/8 in, Tool Length 6 3/4 in, Hose...