| HK-20L | HK-25L | ||
| Rated Voltage (V) | AC 120V or AC 220/230/240V | ||
| Power supply frequency (Hz) | 50/60 | ||
| Normal pressure (kgf /cm² ) | 0.1 (1.42psi) | ||
| Exhaust quantity (L /min) | 21 / 0.76 | 25 / 0.90 | |
| Power (w) | 19 | 23 | |
| Noise level (dB) | 36 | 38 | |
| Closed pressure | psi | 5 | 5 | 
| Kgf /cm² | 0.35 | 0.34 | |
| Weight (kg) | 2.9 | 2.9 | |
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Connector  | 
    Rubber feet  | 
    Diaphragm set  | 
    Actuating Arm  | 
    L-Tube  |