Runestone U 991, which is composed of granite and is 1.5 meters in height, consists of runic text within a serpent that circles a central beast. Although having different imagery, it contains the same message in its inscription as U 937. Because they have the same message, it has been suggested that they once formed part of a coupled memorial at the same site to the deceased brother Veðr. These are considered to be the most recent of the four Funbo inscriptions and, although unsigned, are attributed to the runemaster Fot. U 991 is classified as being carved in either runestone style Pr3 or Pr4.
Read more about this topic: Funbo Runestones