The Anastasia Beverly Hills A1 Pro Brush – Flat Definer Brush is a professional flat, square eyeliner brush designed for ultra-precise eye definition. Its compact shape and firm structure make it ideal for applying product directly along the lash line, helping create sharp, clean lines with expert control.
Crafted with high-quality synthetic fibers, this brush works seamlessly with both cream and powder formulas, allowing versatile use with gel liners, eyeshadows, and brow products. The thin, densely packed bristles provide excellent precision, making it especially effective for techniques like tightlining and detailed liner work.
Its flat edge allows you to press color into the lash line for a soft smoky effect or create crisp, defined eyeliner looks.
Key Features
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Flat, square precision definer brush
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Ideal for eyeliner and lash line detailing
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Firm synthetic bristles for controlled application
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Works with cream, gel, and powder products
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Perfect for tightlining and sharp liner looks
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Can be used for brows and detailed contouring
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Professional-quality, cruelty-free design





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