| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Junfeng New Materials Co., Ltd. | N220 | MT | 980.46 | USD | 20250804 |
| Shandong Junfeng New Materials Co., Ltd. | N220 | MT | 979.08 | USD | 20250801 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1202.86 | USD | 20250801 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1028.82 | USD | 20250730 |
| Dongguan Canyu Chemical Co., Ltd. | N220 | MT | 1049.82 | USD | 20250730 |
| Shandong Junfeng New Materials Co., Ltd. | N220 | MT | 979.47 | USD | 20250728 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1203.35 | USD | 20250728 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1204.16 | USD | 20250726 |
| Shandong Junfeng New Materials Co., Ltd. | N220 | MT | 980.13 | USD | 20250726 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1029.14 | USD | 20250725 |