Carlisle handle half gallon bottle brush with polyester bristles. Wirewound brushes have smaller diameter handles and softer bristles for delicate cleaning of jars, bottles, and glasses with smaller openings. Base resins used to produce blocks and bristles are made of FDA approved materials. Great for easy and delicate cleaning of jars, bottles, and glasses with smaller openings. BPA free. Made in USA. 7-1/4-inches brush length.