The MZE 8030 Extension Tube (30cm) from Sennheiser is a special extension tube designed for use with select Sennheiser microphones. A special bar inside the tube carries the audio signal. The audio source connects to this unit via an XLR connection at the end of the tube. The head of the microphone attaches to the front of the tube via an adjustable pivot piece, which allows you to customize the microphone angle to perfectly meet your needs.