shutter-Shock"s professional Matte Box Bundle is a fully professional matte box kit including all of the components you need in a pro matte box. French flags, donut rings, filter frame, stage, etc. You will not have to run around purchasing multiple products from various vendors to complete your matte box and make it compatible with your equipment. Our top French flag and side wings are detachable, the bayonets lock the flags in tight. The swing-away arm makes changing lenses an snap. Our Matte box bundle comes with 2 universal 360 degree rotating filter stages,2 filter trays that support both 4x4" and 4x5.65" filter sizes. For our customers using an PL filter, the 360 rotating stage is a fix. With 4 sized rubber donuts you can fit 99% of all lens sizes with no problem. 51mm, 64mm, 76mm, 102mm, even custom lens sizes. Shutter Shocks Matte Box is also height adjustable. Product Dimensions: front diameter measurements: 245x160mm back diameter measurement: 140mm; distance from front to back: 115mm. This bundle is a must have for all advanced DV/ DSLR cinematographer!