This LMB-25 Three-Stage Matte Box Set from ARRI is a basic kit including the LMB-25 lightweight matte box, one three-filter stage, three 4 x 5.65" / 4 x 4" combo filter trays, and one top/bottom flag. A required lens clamp adapter is not included in this set. Lens clamp adapters are available separately in diameters up to 143mm.