The Kodiak PFTT-80-2 Double Tuna Tube allows you to keep two tunas (up to 20 lb. each) alive and calm. Tuna Tubes are black on the inside and white on the outside. The inside diameter of the tubes is 8 inches x 26 inches. Both tubes are anodized then white powder coated for long life, and feature quick disconnect mounting brackets for transom mounting, easily removable by removing one 3/16-inch detent pin. Small transom mount nuts mount to transom, and the tuna tube brackets clip to nuts. Two sets of brackets are mounted together, and only require 4 mounting nuts on transom. Plumbed for 1 in. hose.