This installation is for the side mast or vertical rail installation of the KUM8XX and KUM9XX antenna families. The C115 is a heavy duty stainless steel bracket designed to withstand prolonged harsh weather conditions at sea. Stainless steel is grade SS316 and electropolished for a better finish. In order to ensure the safe installation of the antenna, two C115 components are required for each antenna. Quick and easy installation via bracket and bolt device.