Description Hpumps 35 mini series is the smallest size of our air pumps,Website:://.heyipump.net, made of piezoelectric ceramic plate ,suitable for the <50L of fish tank Features Ultra slim and smallest size of air pump world Low power consumption, stable performance <28dB, the most noiseless in the world of air pump Product Info. Model 3501 3501A Vol/Freq. 220V,50HZ 110V,60HZ Dimensions Dia 44*20 Dia 44*20 Weight 25g 25g Noise 28db 28db Power 1.6 watt 0.8 watt Pressure 12kpa /-10% 10kpa /-10% Flow Rate 210mm /-10% 200mm /-10% Water Depth 600mm 500mm Tank Volume < 50L < 50L Attachments 1pc of Air Tube Inner Dia. 4mm Outer Dia. 6mm Length 1000mm 1pc of Air Stone Dia.25mm 1 Power Adapter Based on actual power supply and electric plug type 1 Suction Cup: Integrated