Based on this product's specifications, here are some alternatives and similar models
K&F Neutral Density Variable Filter 58mm Fader ND2–ND400 Gray (model SB7794)
Summary description:
Variable neutral density (ND) filter by K&F for lenses with 58mm thread. Adjustable from ND2 to ND400, the gray Fader filter lets you control light transmission to achieve longer exposures, motion blur, or wider apertures in bright conditions. Designed for landscape, long-exposure, and videography use where flexible light reduction is required.