| Vendor | Spec | Unit | Price | Currency | Date |
| Shanxi Hengxin Chem | N220 | MT | 946.38 | USD | 20251126 |
| Shanxi Hengxin Chem | N220 | MT | 1214.76 | USD | 20251126 |
| Shandong Junfeng | N220 | MT | 988.34 | USD | 20251125 |
| Shandong Junfeng | China national standards | MT | 1214.24 | USD | 20251125 |
| Shanxi Hengxin Chem | N220 | MT | 1214.24 | USD | 20251125 |
| Shanxi Hengxin Chem | N220 | MT | 1213.88 | USD | 20251124 |
| Shandong Junfeng | China national standards | MT | 1213.88 | USD | 20251124 |
| Shandong Junfeng | N220 | MT | 988.04 | USD | 20251124 |
| Shanxi Hengxin Chem | N220 | MT | 1213.4 | USD | 20251122 |
| Hebei Shibei Rubber | N220 | MT | 959.44 | USD | 20251121 |