If your Hitachi pneumatic nailer (like the NR83A, NV83A, or similar models) isn't firing like it used to, worn cylinder plates might be the culprit. This is a 2-pack of genuine Hitachi replacement cylinder plates, part number 877-318. They're designed for specific Hitachi power tool models including NR83A, NR83A2, NR83A5, NR83AA, NV65AC, NV83A, NV83A2, and several others—check the list carefully to ensure compatibility. These are official Hitachi parts, so you know the fit and quality are spot-on. They help restore proper compression and firing action in your nailer. Installation is straightforward if you're comfortable with tool repair (you might need to disassemble the tool). A must-have for contractors, carpenters, or DIYers who rely on their Hitachi nailers and want to keep them running smoothly. Remember, this is just the cylinder plates—the nailer itself isn't included. Keep your tools in top shape with these reliable replacements.