| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1352.76 | USD | 20250307 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1352.12 | USD | 20250304 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1324.23 | USD | 20250227 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1324.37 | USD | 20250226 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1325.04 | USD | 20250221 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1255.13 | USD | 20250214 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1255.06 | USD | 20250212 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1161.67 | USD | 20250107 |