The 6” drainage box seal is already cut to take 6” pipe. As with the 4” seal, push the seal through the hole from the inside, and screw the nut to it from the outside. Push your pipe through, and the easy installation is complete.For use with Polylok Catch Basins & Distribution Boxes.The Polylok 6" Seal & Nut accepts 6" pipe.Works on 6" SCH 40, SDR 35 & corrugated pipe.Includes the 6" seal & nut.Watertight friction fit system, no gluing necessary.