Marinas Battery Operated Air Pumps provide auxiliary air if your main air source fails to operate. This is the perfect back-up air pump in case of electrical failures or can be used as a portable aerator for fish during moves, etc.

Comes complete with 18" airline tubing and airstone
Requires two D batteries (not included)
Brass cylinder improvement
Includes:
Air Pump
Airline Tubing (18")
Airstone