


  
                | No. | model name | diameter (mm) |  airflow [L/min]  | 
     oxygen transfer efficiency  [per m]  | 
     pressure loss [mmAq]  | 
    No. of pores | 
|---|---|---|---|---|---|---|
| 1 | EDD-09 | 270¡¾10 | 50~120 | 5% or more | Less than 300 | 4,000 or more | 
| 2 | EDD-12 | 350¡¾10 | 120~150 | 5% or more | Less than 350 | 6,000 or more | 
| 3 | EDD-20 | 520¡¾20 | 150~250 | 5% or more | Less than 400 | 8,000 or more |