K&F Concept 72mm ND8 to ND128 Variable Neutral Density Filter, Optical Glass Slim Fader ND Filter NO Spot X Black X 18-Layer Nano Coating ND8 ND16 ND32 ND64 to ND128 (Nano-X Series) :
Amazon.com : Neewer 72mm Variable ND Filter, ND2-ND32 (1–5 Stops) Adjustable Neutral Density Filter for Camera Lens with Ultra-Slim Frame, Optical Glass, and Multi-Resistant Coatings, Weather-Sealed & No X Spot : Electronics
Amazon.com : Freewell 72mm Threaded Hard Stop Variable ND Filter All Day 2 to 5 Stop & 6 to 9 Stop - 2Pack : Electronics
Amazon.com : Hoya 72mm Variable Density Screw-in Filter : Camera Lens Neutral Density Filters : Electronics
Amazon.com : K&F Concept 72mm Variable ND2-32 Lens Filter & Filter Cap Kit (2 Pcs) Adjustable Neutral Density Lens Filter with TPU Filter Cap for Lens Filter : Electronics
Amazon.com : Hoya 72mm Variable Density Screw-in Filter : Camera Lens Neutral Density Filters : Electronics
Tide Optics Filtro ND Variable (ND2 - ND400) Filtro Circular de Lente de Densidad Neutra (72mm) : Amazon.es: Electrónica
Amazon.co.jp: K&F Concept KF-NDX49 Variable ND Filter 49mm NDX Dimmer Range ND2 to ND400 Thin Frame Design : Electronics
Amazon.co.jp: NEEWER 72mm Black Diffusion 1/2 Filter Dreamy Movie Effect Ultra Thin Camera Lens Filter Water Resistant Scratch Resistant HD Optical Glass 30 Layer Double-Sided Nano Coating for Video/Vlog/Shooting : Electronics