 
                                         
                                    | NO. | Technical index item | Index | Remarks | |
| 1 | Specification | D-20/10 | 
 | |
| 2 | Inner diameter(mm) | 10±1mm | 
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| 3 | Outer diameter(mm) | 20±1mm | 
 | |
| 4 | The average pore diameter of micropore(mm) | Φ0.012 ~φ0.03 | 
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| 5 | Microporous layout density(pc/m) | 600 ~ 1400 | 
 | |
| 6 | Apparent density (g/cm3) | 0.50~0.70 | 
 | |
| 7 
 | Bubble diameter(mm) 
 | Freshwater | 0.2~ 1 | According to the water viscosity and water level has a certain change. 
 | 
| Seawater | 0.08~3 | |||
| 8 | Effective aeration(m3 / min.m) | 0.02 ~ 0.045 | 
 | |
| 9 | Air flow(m3 / h.m) | 0.1~ 0.4 | 
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| 10 | Service area(m2 / m) | 0.8~ 5 | 
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| 11 | Matched power | 1Kw motor power> 200m microporous aeration tube | ||