| Vendor | Spec | Unit | Price | Currency | Date |
| Dongguan Canyu Chem | N220 | MT | 1034.63 | USD | 20250703 |
| Shandong Junfeng | N220 | MT | 978.71 | USD | 20250703 |
| Shandong Junfeng | China national standards | MT | 1202.41 | USD | 20250703 |
| Shandong Junfeng | China national standards | MT | 1202.02 | USD | 20250702 |
| Shandong Junfeng | N220 | MT | 978.39 | USD | 20250702 |
| Shandong Junfeng | N220 | MT | 977.84 | USD | 20250630 |
| Shandong Junfeng | China national standards | MT | 1201.35 | USD | 20250630 |
| Hebei Shibei Rubber | N220 | MT | 1047.69 | USD | 20250630 |
| Dongguan Canyu Chem | N220 | MT | 1033.72 | USD | 20250630 |
| Shandong Junfeng | China national standards | MT | 1200.66 | USD | 20250628 |