Graduated Neutral-density
From Amazon
Lee Neutral Density 0.6 Grad Soft Filter (150x170 mm Resin) [SW150 ND6GS]
Clifton Cameras
LEE Filters SW150 150x170mm 0.6 Soft Grad Neutral Density Filter
WEX Photo Video
Lee SW150 Neutral Density 0.6 Soft Graduated Resin Filter