C514 Pro Detail Liner by Crown Brush. 

The Pro Detail Liner Brush's long, stiff bristles are designed to hold shape and firmness throughout the application of both traditional and winged eyeliner styles. This high grade sable brush is stiff enough to pick up large amounts of product, but still has enough softness and elasticity to allow it to glide with the shape of the eye.

Bristle Profile: High grade Kolinsky Sable hair, Easy to clean and maintain with proper care, Incredibly soft yet springy enough to maintain shape and structure throughout countless uses, Natural hair easily picks up large amounts of powder.