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