Vocas 114mm to 87mm Step Down Ring for MB-215/MB-255/MB-216 and MB-256Vocas 114mm to 87mm Step Down Ring for MB 215 MB 255 MB 216 and MB 256 When using a matte box as clip on, step down rings can be necessary, with or without thread. This ring is required when using a MB 2xx matte box (with 114 mm front diameter) as a clip on on a lens with a front lens diameter of 87 mm. Technical Specifications Manufacturer Vocas Systems Diameter 114 mm Mounting options Clamp Clip on Yes Color Black EAN 8720041020189 Manufacturer Item