Part Number: 877-323 877-334 877-325 877-852 877-854 877-329 884-068 878-421 878- Package Include: 877-323 Piston Driver, 877-334 877-325 877-852 877-854 877-329 Aftermarket Gasket, 884-068 Aluminum Cylinder, 878-421 Ribbon Spring, 878- Piston Bumper High Compatibility: Compatible with for NR83 NR83A NR83A2 Air Nail Parts Material: Constructed adhering to stringent standards, utilizing top- components. Endures wear, stable performance, and dependable for Easy Installation: Swiftly mount these parts to revitalize your equipment's performance, making it function as if Colour:As Shown Material:Metal Package Contents: 1set * 878- Piston Bumper Compatible Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.