NEW BIG BUBBLES WATERTIGHT AIR PUMP #B-5, BY MARINE METAL PRODUCTS. FOR FRESH AND SALT WATER. AERATES UP TO 7-1/2 GALLONS. WEIGHTED GLASS BEAD AIR STONE WITH 30" AIR LINE TUBING INCLUDED. RUNS UP TO 100 HOURS ON 2 D BATTERIES. PRECISION LOW CURRENT 1/3 AMP MOTOR. WATERPROOF SWITCH. STAINLESS STEEL ADJUSTABLE ATTACHMENT CLIP.