Pondmaster, AP-20, 11 Piece, Pond Aeration Kit, Provides Vital Oxygen To Fish, Plants, & Other Pond Wildlife, Easy To Install, Includes Everything Needed To Aerate A Pond, Aerates Ponds Up To 2,000 Gallons, Includes 1 Each Ap-20 Air Pump, 3 Each 16' Sections Of Air Line Tubing, 1 Each 6 Port Manifold, & 6 Each 4" Air Stones, Also Improves Overall Pond Water Quality, 6"W x 7"H x 9"L.