| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Junfeng | China national standards | MT | 1204.16 | USD | 20250726 |
| Dongguan Canyu Chem | N220 | MT | 1036.14 | USD | 20250725 |
| Hebei Shibei Rubber | N220 | MT | 1029.14 | USD | 20250725 |
| Shandong Junfeng | China national standards | MT | 1204.73 | USD | 20250724 |
| Shandong Junfeng | N220 | MT | 980.6 | USD | 20250724 |
| Shandong Junfeng | N220 | MT | 980.2 | USD | 20250723 |
| Shandong Junfeng | China national standards | MT | 1204.25 | USD | 20250723 |
| Shandong Junfeng | China national standards | MT | 1203.47 | USD | 20250722 |
| Shandong Junfeng | N220 | MT | 979.57 | USD | 20250722 |
| Dongguan Canyu Chem | N220 | MT | 1020.66 | USD | 20250721 |