Description: 【Compact & Lightweight】: With a small size, it is easy to carry around and suitable for tanks and aquariums to use home and office. 【Steady Output】: Adjustable air volume, a strong pump which long time use to promote oxygen additions constantly. 【Quiet Aeration】: The mute pump gives out noise less than 30 dB, and is suitable for the quiet environment to feed , such as living room, bedroom, and so on. 【Easy to Use】: The air Aquarium air pump lots of medium bubbles to aerate your tanks, provides air for transporting or isolating while breeding. 【Wide Applications】: Suitable for outdoor fishing, small to medium size aquariums, tanks, ponds, , and so on.Note:The plug is a Chinese plug and needs to be converted.Note:The plug is a Chinese plug and needs to be converted Specification: Material: ABS Pp; 3.5W Double Hole: Size: 12.2cmx6.5cmx5cm/4.80inchx2.56inchx1.97inch, Suitable for Tank 60-100L; 4W Single Hole: Size: 12.3cmx6.8cmx5.1cm/4.84inchx2.68inchx2.01inch, Suitable for Tank 50-300L; 6W Double Hole: Size: 12.5cmx7.1cmx5.6cm/4.92inchx2.80inchx2.20inch, Suitable for Tank 60-500L; 8W Double Hole: Size: 14.1cmx8cmx6.4cm/5.55inchx3.15inchx2.52inch, Suitable for Tank 70-700L; 10W Four Hole: Size: 16.5cmx15.5cmx6.3cm/6.50inchx6.10inchx2.48inch, Suitable for Tank 90L-1000L; 4.5W Double Hole: Size: 16.5cmx7.5cmx10.5cm/6.50inchx2.95inchx4.13inch; 6.5W Double Hole: Size: 18.5cmx11cmx7.5cm/7.28inchx4.33inchx2.95inch; 5W Double Hole: Size: 15.5cmx9.5cmx6.5cm/6.10inchx3.74inchx2.56inch, Suitable for Tank 60-100L; Package Includes: 1 Aquarium Air Pump(Only Pump)Note:The plug is a Chinese plug and needs to be converted Note: Please allow slightly errors due to manual measurement and different monitors.