K + M 210/9 Heavy-Duty Tripod Microphone Boom Stand (Black)A more compact version of the classic 210 2. The combination of the long legged 201A 2 mic stand and the 211 1 telescopic boom arm. Like the 210 2, the 210 9 sets the standard for professional microphone boom stands. This K & M Microphone stand with Telescopic Boom arm sets the standard for professional microphone stands. With K & M's proprietary Swiss steel tubing, thick diameter walls and heavy die cast zinc base.