| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1213.56 | USD | 20251111 |
| Shandong Junfeng New Materials Co., Ltd. | N220 | MT | 987.78 | USD | 20251111 |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 1213.73 | USD | 20251110 |
| Dongguan Canyu Chemical Co., Ltd. | N220 | MT | 987.92 | USD | 20251110 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 973.81 | USD | 20251110 |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 931.47 | USD | 20251110 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1214.07 | USD | 20251107 |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 1214.07 | USD | 20251107 |
| Shandong Junfeng New Materials Co., Ltd. | N220 | MT | 988.2 | USD | 20251107 |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 931.35 | USD | 20251106 |