Engraving Pen Kit Industrial 1.1 CFM @ Full Load Required Pressure 90 psi Air Inlet 1/4 in NPT 1/4 in Min Hose Size Overall Length 5 In. Hose Length 96 In. Throttle Twist Ring Variable Speed Aluminum Housing Air Hose 3/16 in Bore 2 Air Filter Assembly 3 Stylus - Carbide Tipped Writing and Engraving 4 Anvils 5 Flat Chisels 6 Chisel Blanks 7 Round Nose Chisel 1 Carry Case Includes