| Resin Grade | Manufacturer | Category | Trademark |
|---|---|---|---|
| ASI POLYSTYRENE ASI POLYSTRENE PS 3020-01 | A. Schulman Inc. | PS (HIPS) | ASI POLYSTYRENE |
| ASI POLYSTYRENE PS 3010-01 | A. Schulman Inc. | PS (HIPS) | ASI POLYSTYRENE |
| ASI POLYSTYRENE PS 1010-01 | A. Schulman Inc. | PS (GPPS) | ASI POLYSTYRENE |