Ramsond CRN-45 7/8-Inch to 1-3/4-Inch Nails Coil Air Roofing Nailer Operates with a 60 to 110 psi standard air compressor; equipped with a standard male 1/4-inch 18 NPT air inlet Fastener type: 11-gauge nail (3/4 inch to 1-3/4 inches); Nail capacity: 120 Trigger-actuated mechanism automatically positions and drives nails Minimum operating pressure: 60 PSI; maximum operating pressure: 110 PSI Composite gaskets, seals and rings with Ergo-Grip cushioned comfort