ARRI MB-18 (MB18) Production Matte Box Compatible with 15 and 19mm Support Rods including 2x (4-inch x 5.65-inch) Vertical Filter Frame. The MB-18 is an industry standard production matte box suitable for 15 mm and 19 mm studio support rods.
4″x5.65″ Production Matte Box MB-18 is a flexible wide-angle studio Matte Box that can be used with primes and many zoom Lenses. It is a useful alternative to MB-14 when a smaller build is desired. MB-18 requires a studio bridge plate.