BPro-Grade Heavy Duty Air Punch-Flange 5.5 MM- Pistol Grip ReviewbP PP Pro-Grade Heavy Duty Air Punch-Flange 5.5 MM- Pistol Grip PPunch capacity: 316" (5.5mm).PPiston stroke: 532" (4mm).PInlet size: 14" NPT.PAir consumption: 4cfm. Hose size: 38".PQuality construction.