LEE Filters 150x170mm Hard Edge Graduated Neutral Density Filter Set f — Glazer's Camera
Lee 85 ND Soft Graduated ND Filter Set (0.3ND & 0.6ND & 0.9ND) - Conns Cameras
Amazon.com : Lee Filters 4x6 (100x150mm) Neutral Denisty soft edge grad set includes 0.3, 0.6 and 0.9 soft edge grad filters and triple filter wrap : Camera Lens Neutral Density Filters : Electronics
Lee filters How to use ND Grads filter holder basics - YouTube