Gravity MS CAB CL 01, Microphone Holder for Guitar Boxes, Lightweight and compact, Precise, safe microphone alignment, Swivel arm with variable positioning of the microphone clip, Adjustable clamps for mounting on virtually all enclosures, Clamping range: 300 - 400 mm, Length of boom: 250 mm, 3/8"" Threaded connection, Weight: 0.6 kg