Aftermarket Hitachi Nailer Piston Driver. This Is A Generic Replacement Drivers With O-Ring For The Hitachi Nv83A, Nv83A2 & Nv83A3 Nailerscompatible With:Hitachinv83A2 Full Round Head Coil Nailer Nv83A 3-1/4'' Full Head, Framing Coil Nailer Nv83A14 Nailer Nv83A3 Nailer