Comprehensive 10 pieces assembly features 877 323 driver, 878 421 band spring group, and 878 303 bumper, providing complete maintenance solution with factory grade wedges kits and resistant buffers for optimal nailguns Ideal for professional repair technicians, woodworking specialists, and construction crews requiring pneumatic tool replacement parts to maintain heavy duty NR83 series users in operating condition Premium Stainless Steel Spring Shaft Accessory Specifically designed for NR83 series pneumatic nailguns ( NR83A, NR83A3S,,), this resistant replacement set includes essential components like and O type shims for enhanced tool longevity Perfect for workshop environments and job sites where immediate nailguns repairs are critical, and pneumatic tool maintenance routines This factory accessory restores nailguns functionality to original specifications through its organized component layout and stainless steel durability, Manufacturer: Greabuy