Superior Parts G845 Aftermarket O-Ring Kit Fits Hitachi NV45AA, NV45AB, NV45AB2, NV45AC, NV45AE and NV45AB2(S) Nailers Kit Includes: Part Number Compatible Model and Qty/Pk: SP 872-645 NV45, NV83, NT65, NV65 and NR83 (1/pk) | SP 872-821 NV45, NV65, NV75A and NV83A (1/pk) | SP 876-161 NV45, NV50 and NT65 (3/pk) | SP 876-167 NV45, NH451, NT50A and NT65 (1/pk) SP 877-123 NV45, NH451, NT50A and NT65 (1/pk) | SP 877-124 NV45, NR90AA, NH451, NT50A and NT65 (1/pk) SP 877-125 NV45, NV50 and NT65 (1/pk) | SP 877-126 NV45, NV50 and NT65 (1/pk) SP 877-763 NV45, NR90 and NT65 (1/pk) | SP 877-764 NV45 (1/pk) | SP 884-112 NV45, NV83 and NT65 (2/pk) | SP 885-793 NV45, NV5010A and NV5021A (3/pk) SP 874-820 NV45, NV65, NR83 and NT50 (2/pk) | SP 875-638 NV45, NV65, NR83 and NT50 (1/pk) | SP 876-174 NV45, NV50 and NT65 (1/pk) | SP 878-731 NV45, NV50, NT65 and NR83 (1/pk)