This flat, rectangular extruded tube, also known as a multi-hole extruded tube, consists of multiple channels. These channels help to improve heat transfer efficiency through higher surface-to-volume ratios for HVAC systems, which improves efficiency and helps homeowners, managers, and occupants save money.

| Item | Range |
| Tube length | 20mm-6000mm |
| Tube width | 10mm-220mm |
| Tube height | 1.2mm-30mm |
| Wall thickness | 0.15mm-0.6mm |
| Alloy | 6061 1100 3003 3102 |
| Temper | O HO H112 |
| zinc spraying | 5g/㎡-15g/㎡ |















