Package Includes: as images show, 884-068 Aftermarket Aluminum Cylinder, 877-317 Cylinder Rings,877-334 Aftermarket Gasket, 877-325 Aftermarket Gasket, 877-852 Aftermarket Gasket, 877-854 Aftermarket Gasket, 877-329 Aftermarket Gasket, 878-421 Aftermarket Ribbon Spring Set, 878-303 Piston Bumper. Compatible with: Hitachi NR83 NR83A NR83A2 Air Nail Gun. handy kit makes an overhaul repair of your NR83 framing nail gun fast & easy. These parts install quickly to make your nailer work like new again. A brand-new, unused, unopened, undamaged item in its original packaging.