Zoya Nail Polish Z Wide Brush: The new Z Wide Efficiency fan brush was created for quicker and more even nail polish application to medium and large size nails. The Z Wide Brush contains 60% more bristles than the Zoya Z - Classic Precision brush. The Z Wide Brush fits all Zoya 0.5oz bottles, so switching is easy! **Some recently-released Zoya shades come equipped with the Z Wide Brush already. Please see description of each shade - If a Z Wide Brush is included, it will be stated. Instructions: Remove existing cap/brush from your Zoya Nail Polish and replace with the new Z Wide brush. There will be a gap between the bottom of the cap and the top of the bottle. Put the bottle on a flat surface and press down on the top of the cap. The cap will then sit flush on the bottle. Wait 5 minutes after inserting fresh brush before use on nail.