Mueller Proline 3-1/2-in L x 3/8-in x 3/8-in dia Black Steel Nipple Fitting

B and K offers one of the most extensive selections of black and galvanized malleable iron fittings in the industry. Available in 13 diameters from 1/8-in to 6-in, every fitting is produced to exact specifications. All galvanized products are zinc-coated for water applications – and meet all low-lead requirements. In addition, all of our iron fittings undergo our rigorous testing and quality inspection.