| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1165.55 | USD | 20250418 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1220.59 | USD | 20250415 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1220.75 | USD | 20250411 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1221.58 | USD | 20250408 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1225.75 | USD | 20250402 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1225.93 | USD | 20250331 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1240.38 | USD | 20250328 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1240.19 | USD | 20250327 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1282.16 | USD | 20250320 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1338.15 | USD | 20250311 |