The black K&M 211/1 Boom Arm with 3/8" Thread is a two-piece telescoping boom arm with an adjustable length of 17.1 to 29.3 inches. It features a silent, non-scratching swivel joint and a T-bar locking screw to securely hold its position. It can be used on a standard tripod microphone stand (available separately) with a 5/8" thread.