Neewer 2 Pack ND0.9/1.8 (3/6 Stops) Square ND Filter, 4"x5.65" Dual Sided 30 Multi Nano Coated Cinema Neutral Density Filter for NEEWER Matte Box Compatible with Tilta Compatible with SmallRig | Neewer | | 2-Pack 4"x5.65" Square ND Filter Set | ND0.9 & ND1.8 for Matte Box Cinema Filmmaking | Black | Best Buy