| Vendor | Spec | Unit | Price | Currency | Date |
| Jinan Xinhou | N330 | MT | 253.14 | USD | 20250922 |
| Hebei Shibei Rubber | N220 | MT | 1054.76 | USD | 20250922 |
| Dongguan Canyu Chem | N220 | MT | 1054.76 | USD | 20250922 |
| Shanxi Hengxin Chem | N220 | MT | 1012.57 | USD | 20250922 |
| Shanxi Hengxin Chem | N220 | MT | 1209.46 | USD | 20250922 |
| Shandong Junfeng | N220 | MT | 984.45 | USD | 20250922 |
| Shandong Junfeng | China national standards | MT | 1209.46 | USD | 20250922 |
| Jinan Xinhou | N220 | MT | 1349.68 | USD | 20250920 |
| Shanxi Hengxin Chem | N220 | MT | 1209.09 | USD | 20250920 |
| Shandong Junfeng | N220 | MT | 984.14 | USD | 20250920 |