The 21231 Telescoping Boom Arm from K&M is an adjustable boom arm with 5/8" threading which mounts onto the company's model 20811 and 21411 stands or any standard microphone stand. It features two sections extending from 43.30 to 78.74" (1.09 to 1.99 m) and an adjustable counterweight, which together provide added reach when miking groups, drum overheads, and more.