The Heil HB-1 is an articulated arm built of very substantial steel channel structure and balanced by four external springs. It is capable of supporting microphones up to 1.3 kg. The boom moves freely and quietly. It is the perfect for Podcast, Amateur Radio and Commercial Radio studios. The HB-1 is shipped with a standard brass lined 'C' clamp mount with a 50mm span width. The channel is designed so a small diameter microphone cable can be hidden and connectors soldered to each end. The HB-1 Boom accepts all of the standard 5/8" -27 threaded microphone clips on to the chrome stem. (The PR-781 microphone shown above is not included).