Mic flags are moulded from virtually unbreakable, non-reflective plastic and are supplied with their own high quality Acoustic Foam Insert that fits all known Microphones with a handle / shaft size between 5mm and 44mm diameter, such as the most popular mics, Shure SM 58, Beyer M58, Electro-Voice RE50, EV 635A, Sennheiser E935, HHB FlashMic. etc, etc