This Marlin manufactured rear sight assembly measures  approx. .350" high, has a .095" wide elevator groove and includes a .079" wide elevator. This rear sight assembly  is for the model 25N bolt action rimfire rifle and is in very good condition with light wear. (file photo)

Note: Marlin model 25N rimfire rifles with the following year/serial number have been observed with this part:

 1990: 10740038

1992: 08572951