Hitachi 18001 O-Ring Parts Kit for NV45AB Nailer All the rings and gaskets needed to do a basic overhaul of the NV45AB Genuine Hitachi parts Includes a diagram showing how to install these parts in the nailer Will fix the NV45AB's air leak or slow operation Comes with a 90-day limited warranty Includes all the rings and gaskets needed to do a basic overhaul of the NV45AB This repair kit includes all genuine Hitachi parts Includes a diagram how to install these parts in the nailer Will fix the NV45AB's air leak or sluggish operation Comes with a 30-day limited warranty