JamStands Series Telescoping Microphone Boom Arm. Instantly turn any mic stand into a boom stand with the JS-TB100 Telescoping Microphone Boom Arm! The all-metal housing is powder coated for scratch resistance and the telescoping boom arm will stand up to day-in/day-out use.SpecsBoom Length: 19.5” - 34.5” (495mm - 876mm)Threading: 5/8”Weight: 1.3 lbs. (.6 kg)