"MUELLER" DIELECTRIC UNION *1/2"FPT x 1/2" sweat *For water to 210 degrees F. *Prevents electrolysis or galvanic corrosion when connecting dissimilar materials *Galvanized steel *Brass socket *This product contains less than 0.25% weightedaverage lead content on wetted surfaces *Boxed *Discovery CON, NBR, SUP, EXP