2 Pack 877-317 Cylinder Rings. Compatible with Hitachi Power Tool Models NR83AA3, NR90AD, NR90AE, NR90ADPR, NV65AC, NR90AE(S), NV83A2, NR90AF, NR83A2(S), NV83A23, 83AA2, NR83A3S, NR83A, NR83A3, NR83AA, NV90AG, NR83AA2, NR83AA4, NV65AA, NV83A3, NV75A, NR83A2. Material: Rubber. 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