DOUBLE TYPE; PVC MATERIAL; 6 INCH X 6 INCH X 4 INCH X 4 INCH NOMINAL SIZE; SDR 35 SCHEDULE; NSF, UPC, CSA B182.2, IAPMO APPLICABLE STANDARD; NON-PRESSURE DRAINAGE, SEWER, SURFACE WATER APPLICATION; 0.181 TO 0.201 INCH THICKNESS; INJECTION MOLDED PROCESS