Earth Therapeutics Professional Nail Brush 100% Pure Bristle Description: Extra fine grade. Disclaimer These statements have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure, or prevent any disease. • Genuine boar"s hair is secured into a compact wooden base to provide two-sided versatility. Longer bristles reach to clean under nails while shorter side scrubs away dirt and buffs nail bed to a healthy luster. Specially contoured for secure grip.