... .without oil, easy operation 2.long life span 3.product specifications,wide adaptation 4.Energy-saving,large gas volume Electric-magnetic Air ... use:This series of pumps is non-lubrication one, which gives off very clean air, it can be used for aquatic breeding ... gas stoves, etc.Features:1.Convenient to operate without oil, noise and air pollution.2.Cylinders and pistons ae of excellent materials ...