Our D-box seals are the only true water-tight seals on the market today. Our 4 in seal fits in both our 12 and 20 in plastic D-box. It accepts 2, 3 and 4 in and corrugated pipe. Our 6 in seal works in our 20 in plastic D-box. No other seals can do so much.
POLYLOK™ 4 in Seal and Nut, 5.67 in Dia, LLDPE/Polypropylene, Suitable For Use With: 12 and 20 in D-Boxes
| Diameter | : | 5.67 in |
| Material | : | LLDPE/Polypropylene |
| Suitable For Use With | : | 12 and 20 in D-Boxes |
Instruction/Installation Manual
Video Link