| Surface | Surface Thickness (mm) | Inner Diameter of Heat Transfer Surface (mm) | Contact Area with Heating Block (mm2) | Average Surface Roughness (mm) | Method* |
| Smooth | 5.2 | 20 | 196 (14 × 14) | 7.75 | Laser |
| Blasted | 5.2 | 20 | 196 (14 × 14) | 3.52 | Contact |
| Copper-plated | 5.2 | 20 | 196 (14 × 14) | 40.8 | Laser |
| Finned | 5.2 | 20 | 196 (14 × 14) | 0.68 | Contact |