Package Includes: as images show, 877-393Z Nail Feeder 1 pcs, 1pack Ribbon Spring and 1pack Needle Roller. Part Number: 877-393Z. 878421 Compatible With: Hitachi NR83A NR83 A2NR83A2(S) NR83A3 Framing Nailers. These parts install quickly to make your Framing 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