Package Includes: as images show, Piston Driver SP 878-156, Feeder Shaft 877-825, Feeder Shaft Ring 877-826, Feeder Spring 877-761, Bumper 878-179, Bumper Sheet 877-993,Spring Kit 877474,Gasket Kit 877-761. Compatible With: with Coil Roofing Nailer NV45AB2 NV45AB. 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