The ASC Anvil 3/4"x3-1/2" Galvanized Nipple. Crafted from welded steel and hot-dipped galvanized for superior corrosion resistance, this standard nipple meets ASTM A/53 standards and is manufactured with no more than 0.25% weighted average lead content on wetted surfaces. Standard Schedule 40 nipple features 3/4-inch MIP (male iron pipe) fitting sizes on both ends for easy installation.