| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1210.77 | USD | 20250908 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1210.38 | USD | 20250904 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1209.43 | USD | 20250903 |
| Shandong Junfeng New Materials Co., Ltd. | N220 | MT | 984.68 | USD | 20250902 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1209.75 | USD | 20250902 |
| Shandong Junfeng New Materials Co., Ltd. | N220 | MT | 984.92 | USD | 20250901 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1210.04 | USD | 20250901 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1048.23 | USD | 20250901 |
| Dongguan Canyu Chemical Co., Ltd. | N220 | MT | 1055.27 | USD | 20250901 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1047.7 | USD | 20250827 |