SmallRig 4 x 5.65" ND0.3（1 Stop）Filter 4224 1.Double-sided multi-layer nano coating, with high-accuracy color reproduction 2.Made of high-clarity optical glass from Germany, with less color cast 3.Waterproof, oil-resistant and anti-scratch 4.Compatible with 4 x 5.65" matte box system.
eBay