K & M Telescopic boom arm (1 piece) Review PositiveBoulder Microphones Stands July 25, 2018October 5, 2018Accessories, K M, Microphones & Accessories, Musical Instruments 0 Comment Classic one piece boom arm Extremely strong and durable 3/8″ thread and sliding adjustment Non-marring swivel joint Easy tightening with T-Bar locking screw K & M Telescopic boom arm (1 piece)