The rings of power are all 20 band.Built in the Second Age of Middle-earth by Elf a skilled technician excellence of the Metropolis eregion named Celebrimbor.Built for humans and dwarfs the 16 band the supervision of Sauron figure, which appeared in the name Annatar.But Celebrimbor built the ring for elf three band by Sauron nor an accomplice in creating it.