This K493F connection box is for KUM48X, KUM6XX and KUM7XX. It is used to connect coaxial cables for reception applications. Offers extended frequency range. This box is manufactured in premium quality materials in order to prevent galvanic corrosion. The box is always subject for improvement. The box has the same rugged design as all other AC Antennas products thus it withstands harsh environmental conditions, both on Sea and Land