Part Number: NT65M2 DBO65-01. Package Includes: as images show, 885-667 Aftermarket Piston Driver 1pck, 885669 Piston Bumper 1pck, G866 Aftermarket O-Ring Kit 1pck. Fit for Hitachi NT65M2 Finish Nailer Replacement Parts. These parts install quickly to make your nailer work like new again A brand-new, unused, unopened, undamaged item in its original packaging. Return refund: If you have any questions, you can refund in full without any problems