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UMB-1 Universal Mattebox (Extra Stage Set) allows all versions of the Universal Mattebox to be converted to three stages. Includes individual filter tray catcher, rotation lock, filter lock, and 4x5.65 filter frame. Also accepts 4x4 filter sizes.
Weight: 181.4 g (.5 lbs)
Dimensions: 12.7 x 177.8 x 177.8 mm (0.5 x 7.5 x 7.5 in)
Universal Mattebox Kit Guide