| Product attributes | Parameter |
| Mounting hole position | Precisely align |
| Pulley Jumping | 0 |
| TO Belt pulley height | 142.8 |
| Belt pulley thread | 4-M10X1.5 |
| TO Impeller height Ⅱ | 7 |
| TO Shaft head height | 146 |
| Air tightness testing | No leakage detected under negative pressure of 0.1 MPa |
| Appearance Ⅰ | There is no supplier logo on the surface |
| Appearance Ⅱ | There are no appearance defects such as dirt, rust, paint peeling, etc |
| Assembly rotation | It rotates flexibly by hand, without any clamping stagnation or abnormal noise |