The On Stage MSA7020B Top Mount Microphone Boom Arm is a professional 35 inch non-telescoping boom. The On Stage MSA7020B features standard 5/8 inch-27 threads, a deluxe chrome washer, plastic end caps and stamped rubber pads which allows for maximum grip. The all-steel construction combined with a locking washer will secure any boom in place. Boom arms maximum rotation is 320 degrees to allow for full extensions and max flexibility when miking your vocals.