Ideal for the professional, it works well for an advancing musician.Professional boom stand with die-cast aluminium hub and collets for long use and abuse.Non-telescoping boom is 30 1/8".Die-cast collet adjusts height from 39" to 66 1/2".Square boom clamp design with large clamping area and T-handle adjustment knob for boom tilt adjustment.Thread-adapter included.plastic tuning clamp.Aluminium alloy base with base spread of 23".