The Shure RPM640 is a replacement Flange Mount Kit that works with Shure Easyflex EZG and EZG-SE Series and Microflex series gooseneck microphones. These mics are miniature gooseneck-mounted electret condenser microphones designed primarily for speech and vocal pickup. They can be mounted on lecterns, pulpits, or conference tables. All models include a preamplifier and are available with cardioid cartridges. EZG-SE Series microphones can be screwed onto a microphone stand or the supplied 5/8 inch, 27 threaded flange. They can be easily changed from side-exit to bottom-exit to conceal the cable. The flange is 1-3/16" in diameter.