Vocas 143 mm Flexible donut adapter ring for MB-435 / MB-436 & MB-455 Flexible adapter ring kit, 143 mm, for MB-4xx matte boxes. Maximum lens diameter is 132 mm. Can also be used as holder for a 138 mm round filter. The matte box needs to mounted to bars. Includes soft rubber donuts: 112 mm, 100 mm, 94.5 mm, 75 mm and 50 mm.
