| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1047.69 | USD | 20250630 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1039.52 | USD | 20250625 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1038.91 | USD | 20250623 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1036.36 | USD | 20250613 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1050.27 | USD | 20250609 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1064.18 | USD | 20250604 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1035.71 | USD | 20250520 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1084.0 | USD | 20250514 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1081.91 | USD | 20250509 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1165.47 | USD | 20250422 |