Bower 67mm variable neutral density nd filter 2 to 8 stops

77mm 2-in-1 Variable Adjustable ND Filter Neutral Density Fader 5-Stop ND2-ND32 and CPL

NEEWER 67mm True Color Variable Filter Neutral Density Filter VND Filter and Magnetic ND32 Lens Filter No Color Vignetting ND2-512 (1-9 Stops)

Haida CPL VND Filter 67mm PL Filter Variable ND Filter Stop ND8 ND16 ND32 ND64 ND128 Neutral Density Filter Two In One + - 3-7