Hitachi NV45AB,NV45AB2 coil roofing nailer Repair Rebuild Kit All of the O`Rings in the Tool Gasket Part#876-417, Gasket #877-754, Gasket #877-131, Gasket #877-767, Gasket #876-713 Exhaust Valve Part#878-417 Clyinder check seal #876-167 Feeder Spring Part#877-761 Bumper sheet #877-993 Trigger Packing #878-734 & Trigger Ball #875645