Victaulic® Roust-A-Bout® Coupling, Series: Style 99, Coupling Fitting, Connection Size 1: 4 in, Connection Type 1: Plain End, Connection Size 2: 4 in, Connection Type 2: Plain End, Plain End|Plain End Connection, Iron, Ductile Iron Material Construction, Enamel-Coated, For Use With: Plain End Pipe, 4-1/2 in OD x 10 in L x 4 in H, -20 to 180 deg F, Additional Information: ASTM A536, Grade 65-45-12 Material Standard