| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 989.36 | USD | 20251210 |
| Shandong Junfeng New Materials Co., Ltd. | N220 | MT | 989.36 | USD | 20251210 |
| Shandong Junfeng New Materials Co., Ltd. | N220 | MT | 989.08 | USD | 20251209 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1215.15 | USD | 20251209 |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 1003.21 | USD | 20251209 |
| Shandong Junfeng New Materials Co., Ltd. | N220 | MT | 989.2 | USD | 20251208 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1215.31 | USD | 20251208 |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 1003.34 | USD | 20251208 |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 1003.55 | USD | 20251205 |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 947.01 | USD | 20251205 |