Additional Details ------------------------------ Product description: Black Reducing CouplingBlack malleable iron. Each fitting is individually flag tagged. Import.No. 521-310BG: 1/4 IN x 1/8 INNo. 521-320BG: 3/8 IN x 1/8 INNo. 521-321BG: 3/8 IN x 1/4 INNo. 521-331BG: 1/2 IN x 1/4 INNo. 521-332BG: 1/2 IN x 3/8 INNo. 521-342BG: 3/4 IN x 3/8 INNo. 521-343BG: 3/4 IN x 1/2 INNo. 521-353BG: 1 IN x 1/2 INNo. 521-354BG: 1 IN x 3/4 INNo. 521-364BG: 1-1/4 IN x 3/4 INNo. 521-365BG: 1-1/4 IN x 1 INNo. 521-375BG: 1-1/2 IN x 1 INNo. 521-376BG: 1-1/2 IN x 1-1/4 INNo. 521-386HC: 2 IN x 1-1/4 INNo. 521-387BG: 2 IN x 1-1/2 IN