| Model | K1/ 10*7-4holes | K3/ 25*10-19holes | K4/ 25*8-37holes | K5/ 25*4-64holes |
| Specifications(mm) | ∅10×7 | ∅25×10 | ∅25×8 | ∅25×4 |
| cut off mud volume(cm³) | 0.96± 0.02 | 0.95± 0.02 | 0.96± 0.02 | 0.96± 0.02 |
| Total specific surface area (m²/m³） | 750 | 500 | 820 | 1000 |
| Bulk density (kg/m²） | 140 | 100 | 120 | 130 |
| void ratio (%） | 85 | 90 | 88 | 90 |
| Allocation ratio (%） | 10~50 | 10~60 | 10~45 | 15~45 |
| Biofilm formation time (d) | 5-15 | 5-15 | 5-15 | 5-15 |
| BOD5 Oxidation efficiency gB0D5/m3.d | 2000~10000 | 2000~10000 | 2000~10000 | 2000~10000 |
| COD Oxidation efficiency gCOD /m3.d | 2000~15000 | 2000~15000 | 2000~15000 | 2000~15000 |
| Material | HDPE | HDPE | HDPE | HDPE |
| Service life | over 15y | over 15y | over 15y | over 15y |