| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1048.23 | USD | 20250901 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1047.7 | USD | 20250827 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1044.02 | USD | 20250819 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1029.34 | USD | 20250811 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1029.48 | USD | 20250804 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1028.82 | USD | 20250730 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1029.14 | USD | 20250725 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1013.67 | USD | 20250721 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1014.54 | USD | 20250717 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1014.11 | USD | 20250714 |