| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1293.72 | USD | 20250604 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 1064.18 | USD | 20250604 |
| Dongguan Canyu Chemical Co., Ltd. | N220 | MT | 1057.23 | USD | 20250604 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1294.02 | USD | 20250603 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1294.4 | USD | 20250530 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1293.34 | USD | 20250529 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1293.57 | USD | 20250528 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1294.67 | USD | 20250526 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1293.41 | USD | 20250522 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1292.8 | USD | 20250521 |