Commercial Purpose Ferrite Balun Cores are used for matching unbalanced coaxial transmission lines or systems to balanced two-wire lines or systems. Ferrite Balun Cores are available in a sturdy construction that ensures optimum performance for longer period of time. Ferrite Balun Cores are also known as balanced converters; line-balance converters. Commercial Purpose Ferrite Balun Cores come in different sizes to cater to specific requirement.