DescriptionHpumps 4112 air pump is made of piezoelectrical ceramic plate with appr. 60L/hour air flow volume,Website:://.heyipump.net, suitable for the medium size fish tankFeaturesHigh air flow design , 1L/minBlack and white two optionsMatch-box structure design,attractive and fashionUltra quiet, ideal for placing in the bedroom and living roomProduct Info.Model                   4112                        4112AVol/Freq.               220V,50HZ                   110V,60HZDimensions              62*49*21                    62*49*21Weight                  52g                         52g   Noise                   38db                        38dbPower                   3.5 watt                    2.7 wattPressure                13kpa /-10%                12kpa /-10%Flow Rate               900mm /-10%                800mm /-10%Water Depth             600mm                       500mmTank Volume             < 100L                      < 100LAttachments1pc of Air Tube        Inner Dia. 4mm                       Outer Dia. 6mm                       Length 1000mm1pc of Air Stone       Dia.40mm1 Power Adapter        Based on actual power supply and electric plug type1 Suction Cup:         Detachable