Boom Arm for Microphone HyperX Caster, Toolless adjustment, Built-In cable managemen, C-Clamp, Internal spring-assisted movement, Black. PN: 786H6AACompatibilityPC. Microphones and Cameras 0.45lb to 2.2lb (0.2kg to 1kg) with a 1/4in, 3/8in, or 5/8in threaded mount.What's in the boxCaster Microphone and Camera Arm, C-Clamp for desktop mount, 3/8in. to 1/4in. Adapter, 3/8in. to 5/8in. Adapter, Quick Start Guide.