SpearsĀ® Van Stone Flange, Flange Fitting, 6 in Connection Size 1, Connection Type 1: FPT, 6 in Connection Size 2, Connection Type 2: FPT, FPT|FPT Connection, PVC, Material Construction: Molded PVC, Gray, 1-3/8 in Flange Thickness, 8 Bolt Holes, 3/4 in Bolt Hole Diameter, Pressure Class: 150 lb, 11-7/32 in OD x 6-19/32 in H, Additional Information: 9-1/2 in Dia Bolt Circle