| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Huiyihai Water Purification Materials Co., Ltd. | China national standards | MT | 210.07 | USD | 20250811 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 210.07 | USD | 20250811 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 322.11 | USD | 20250811 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 210.07 | USD | 20250811 |
| Henan Huiyihai Water Purification Materials Co., Ltd. | China national standards | MT | 210.14 | USD | 20250810 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 210.14 | USD | 20250810 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 210.14 | USD | 20250810 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 322.21 | USD | 20250810 |
| Henan Huiyihai Water Purification Materials Co., Ltd. | China national standards | MT | 210.14 | USD | 20250809 |