Package Includes: ( 10 PACK) Gaskets (as the picture shows). Aftermarket Gasket Kit fits Hitachi . fits Hitachi NR83A and NV83A Series Nailers. Premium Materials Stainless Steel with Rubber Coating. Maximum sealing result - no air leak. 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.