UMB-1 Universal Mattebox (Swing Away) comes standard with two rotating 4x5.65 filter stages (with an optional third stage available), individual tray catchers, folding French flag, 143mm native diameter opening, NATO standard accessory rails on left, right, and top for attaching accessories, ARRI style rubber belows with 114mm standard opening, a complete set of clamp on reduction rings, and a height adjustable swing away bracket. The UMB-1 is designed to be user upgradable and quick to transition from swing away, to clamp on, to ultralight when using a stabilizer.

Reduction rings snap into the bellows quickly making lens transitions fast and easy. Another great feature of these reduction rings is that they are compatible with all 3rd party 114mm threaded bellows since they have specially designed tabs.