| Resin Grade | Manufacturer | Category | Trademark |
|---|---|---|---|
| WPP PPC4IMVJOSB26529-Black | Washington Penn Plastic Co. Inc. | PP Impact Copolymer | WPP |
| WPP PPC4IMVJOS-Black | Washington Penn Plastic Co. Inc. | PP, Unspecified | WPP |
| WPP JOSB26569-Black | Washington Penn Plastic Co. Inc. | PP, Unspecified | WPP |