This is a A-AR21060 Sealed Beam Bulb (6 Volt) PN: AR21060Main Description As Following : A-AR21060 Sealed Beam Bulb (6 Volt) P.N: AR21060 Dim A (1): 4 1/2" DiameterDim B (2): 2 Screw TerminalDim C (3): (4511 Trapezoidal) Stocked As: A-28A121 Found in Section & Models : Lights & Related Parts > Sealed Beams, John Deere (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : Dim A (1): 4 1/2" Diameter Dim B (2): 2 Screw Terminal Dim C (3): (4511 Trapezoidal)