The Lectrosonics Antenna for 200 & 400 Series Beltpack Transmitters (Frequency Block 19) is a color coded antennas for UM belt packs, newer SM series belt-pack units and also newer SR receivers. Construction is of nearly indestructible steel wire rope with a stainless steel connector. The block is selected by the user and the antenna is cut to an included template's recommended length. Rugged wire cutters are required. Multiple color coded caps are included.