A. FOOD-GRADE STAINLESS STEEL: This beer tap plug brush is made of food-grade 304 stainless steel that is commonly used in kitchen taps. Even after prolonged exposure to liquid, it does not get rusty and thus will not contaminate the beer. B. EFFECTIVE & DURABLE: The WXJ13 beer tap plug brush's stainless brush head is securely fastened to the knob, and thus making the product more durable. The wide brush plug is compatible with most beer faucets. Gently twist the brush to scrub off precipitate inside the spout, or plug into the spout until firmly sealed to keep bugs away. C. EASY TO USE: You just need to insert the beer faucet cleaning brush into the beer tap, rotate the brush head to clean the beer faucet to keep dust away from entering the beer. Note: Soak it in water and rinse it before each use. D. MATERIAL DETAILS: The brush handle is made of food grade polypropylene, the brush head is made of bristles, which has strong decontamination, acid and alkali resistance, high temperature resistance. Even after prolonged exposure to liquid, it does not get rusty and thus will not contaminate the beer. E. PROPER SIZE & QUANTITY: The size of the beer line cleaner is about 2.3 inches in length, 0.86 inch in width, and the bristles are about 0.55 inch in diameter. You will receive 30 pieces of beer tap plugs in total. The quantity is sufficient for you to apply and replace, and can easily meet your daily use and other requirements.