ASC Anvil 1/4"x4-1/2" Galvanized Nipple is made of welded steel and has a hot-dipped galvanized finish for corrosion resistance, meeting ASTM A/53 standards. Standard Schedule 40 nipple. The fitting size on both ends is 1/4 inch MIP (male iron pipe), making it easy to connect with other plumbing fixtures. Manufactured in the USA, this nipple contains no more than 0.25% weighted average lead content on wetted surfaces, ensuring safe and clean water flow.