Grace Design SB-66-BSW - 66cm SpaceBar Stereo Kit (BSW Threads)Includes 66cm bar, clamp, (2) standard mic holders and (1) tall mic holder. Available with standard 5 8 27 mic mount threads (most common for USA) or 3 8 16 British Standard Whitworth. The Spacebar allows for precise and repeatable setting of microphone capsule spacing, angle of incidence, and rotation around the x axis. With precision scales for angle and distance engraved on the Spacebar components, it is easy to make perfectly repeatable stereo