Breza Air Pump, Capacity: Up to 20gal, Outlet: single, Output: 1.0 L/min @ 2.61 psi, Power: 2.0W

Breza Air Pump, Capacity: Up to 40gal, Outlet: single, Output: 1.5 L/min @ 2.9 psi, Power: 3.0W

Breza Air Pump, Capacity: 5-50gal, Outlet: single, Output: 2.5 L/min @ 2.9 psi, Power: 3.5W, High/Low Setting

Breza Air Pump, Capacity: 20-50gal, Outlet: single, 2.5 L/min @ 3.19 psi, Power: 3.5W, Flow Control Knob

Breza Air Pump, Capacity: 50-100gal,Outlet: Dual,3.0 L/minx2 @ 3.19 x 2 psi,Power: 4.0W Flow Control Knob