| Vendor | Spec | Unit | Price | Currency | Date |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 1212.5 | USD | 20251024 |
| Shandong Junfeng New Materials Co., Ltd. | N220 | MT | 986.92 | USD | 20251024 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1212.5 | USD | 20251024 |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 1212.67 | USD | 20251023 |
| Shandong Junfeng New Materials Co., Ltd. | N220 | MT | 987.06 | USD | 20251023 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1212.67 | USD | 20251023 |
| Shandong Junfeng New Materials Co., Ltd. | N220 | MT | 986.55 | USD | 20251022 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1014.74 | USD | 20251022 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1212.05 | USD | 20251022 |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 1212.05 | USD | 20251022 |