Lee Filters 150x150mm Big Stopper Neutral Density 3.0 Filter for SW150-Series Filter Holder, 10 Stop Lee Filters 150x150mm Big Stopper Neutral Density 3.0 Filter - SW150 Tin - Exposure Guide - Lee Filters Lifetime Warranty Compatibility: SW150-Series Filter Holder Filter Type: Solid neutral density Size: 150 x 150mm / 5.91 x 5.91" Thickness: 0.1" / 0.25cm