K&F Concept Nano-X ND2-ND32 Green Multicoated Variable KF01.1375
Amazon.com : K&F Concept 67mm Variable ND Filter ND2-ND400 (1-9 Stops) with Putter HD 28 Multi-Layer Coatings Import AGC Glass Adjustable Neutral Density Filter for Camera Lens : Electronics
K&f Concept Nd2-nd32 Fader Nd Filter 52mm 62mm 67mm 72mm 77mm No "x" Spot Neutral Density Variable Filter For Canon Nikon Sony - Camera Filters - AliExpress
K&F Concept 72mm Fader ND Lens Filter Variable ND2 to ND32 for Camera no x Spot | eBay