The UMB-1 Universal Matte Box (Pro) is the fullest configuration in Wooden Camera's UMB-1 system, mounting to 15mm LWS rods on a height-adjustable, swing-away bracket. It shares the 143mm diameter opening of the range, fitting lenses up to 143mm O.D., and carries two rotating 4 x 5.65" filter stages as standard, with an optional third stage available as an add-on. The package includes an ARRI-style rubber bellows with a 114mm standard opening, a set of bellows reduction rings that snap in quickly for fast lens changes and suit third-party 114mm threaded bellows, a clamp-on adapter set, and a universal cloth donut for non-standard lens diameters. NATO accessory rails run along the left, right and top of the housing, and the Pro ships with top, bottom and side flags fitted, rather than the single top flag included with the other configurations. It shares its opening, filter-stage and rail layout with the Base, Clamp On and Swing Away configurations, and is the only one bundling the full flag set and clamp-on set alongside the swing-away bracket and bellows.