Description: 【Compact & Lightweight】: With a small size, it is easy to carry around and suitable for fish tanks and aquariums to use home and office. 【Steady Output】: Non adjustable air volume, a strong pump which durable long time use to promote oxygen additions constantly. 【Quiet Aeration】: The mute pump gives out noise less than 30 dB is suitable for the quiet environment to feed fish, such as living room, bedroom, and so on. 【Easy to Use】: The air Aquarium air pump lots of medium bubbles to aerate your fish tanks, provides air for transporting fish or isolating fish while breeding. 【Wide Applications】: Suitable for outdoor fishing, small to medium size aquariums, fish tanks, ponds and so on. Specification: Material: ABS Plastic 3W: Size: 8.2cmx4.3cmx3.8cm/3.23inchx1.69inchx1.50inch, Air Output 1.5L/min, Suitable for Fish Tank 30-60L 3.5W: Size: 95cmx67cmx45cm/37.40inchx26.38inchx17.72inch, Air Output 3L/min, Suitable for Fish Tank 40-80L Package Includes: 1 Aquarium Air Pump(4 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.