Features: *Aftermarket Piston Bumper for Hit NR83A, NR83A2 and NR83A2(S) replaces 883-511, 878649 and 877376. Precision machined, virgin high density yellow color plastic framer bumper. *Compatible with: Hit: NR83A | NR83AA | NV65AA | NV75A | NV83A | NV65AC | NR83AA3 | NV83A2 | NV85AG | NR83A2(S) | 83AA2 | NR83AA2 | NR83A3S | NR83A3 | NR83AA4 | NV83A3 | NR83A2 | NV83A4 *883511 878303 Aftermarket Piston Bumper for Hit NR83 Nailers 883-511 878-303 Specifications: *Aftermarket Piston Bumper for Hit Nailers *Replace Part: 884-959 888-100 *Compatible with: Hit NR90AE, NR90AD, NV90AG , NR90AE(S) , NR90AF, NR90ADPR *Manufacturer：‎Superior Parts *Item Weight：‎12 ounces *Package Dimensions：‎6.7 x 4.4 x 1.5 inches *material: plastic Package Contents: 5pcs Yellow Piston