49mm Slim Fader Variable ND Filter Adjustable Neutral Density ND2 to ND400 - AliExpress
Fotga 52mm Slim Fader Variable Nd Filter Adjustable Neutral Density Nd2 To Nd400 - Camera Filters - AliExpress
Neewer 37mm Clip-on Nd 2-400 Cellphone Camera Lens Filter Kit: Adjustable Neutral Density Filter With Phone Clip For Smartphone - Camera Filters - AliExpress
K&f Concept 52/58/62/67/72/77/82mm Fader Nd Filter Neutral Density Variable Filter Nd2 To Nd32 For Camera Lens No "x" Spot - Camera Filters - AliExpress
55mm Sony Lens Nd Filter | Neutral Density Filter | 58mm Graduated Filter - Graduated - Aliexpress
Knightx Nd2 To Nd1000 Fader Variable Nd Filter Adjustable For Canon Sony Nikon 1300d D5100 D3300 Photography 52mm 58mm 67mm - Camera Filters - AliExpress