Everflow Supplies NPBL1855 5-1/2" Long Black Steel Nipple Pipe Fitting with 1/8" Nominal Size Diameter Overflow part number NPBL1855 Black coated 5-1/2" long Steel nipple 1/8 inch Nominal pipe diameter with male threaded ends Schedule 40 pipe wall thickness Meets or exceeds all applicable ASTM and ANSI standards