Roller Balls
A roller ball meters small doses of a thin formula directly onto skin, which is why it is used for eye care, serums, and oils. Whether the ball glides or drags comes from the tolerance between ball and housing, so it is a tooling question.

Roller Ball
A roller ball meters small doses of a thin formula directly onto skin, which is why it is used for eye care, serums, and oils. Whether the ball glides or drags comes from the tolerance between ball and housing, so it is a tooling question.


