What are the four serum types in this listing?

The yellow option is Brow & Lash Booster Serum, the gray option is Lash Booster-Fixer Serum, and the colored Lash Booster Serums come in 001 Black and 002 Brown. Together, they cover daily care, fixing, and colored makeup.

Is the yellow Booster Serum made for both brows and lashes?

Yes. The yellow Brow & Lash Booster Serum is designed for both areas, with a ball tip that reaches close to the roots and a curved spiral brush that follows the direction of the hairs.

What kind of applicator does the yellow Booster Serum have?

It pairs a ball tip for reaching close to brow and lash roots with a curved spiral brush that follows the direction of the hairs.

How should I apply the serum to my lashes?

Place an appropriate amount on the brush, then lift it through your lashes in a zigzag motion from the inner side toward the outside.

Do all four versions work as mascara alternatives?

No. The 001 Black and 002 Brown options are the colored mascara alternatives. The yellow option focuses on daily care, while the gray option is for fixing.