Strike King® Coffee Tubes contain real coffee bean granules and coffee bean oil, providing a natural and enticing scent for fish. The coffee scent not only increases the fishes' attraction to the tube, but also masks any human or plastic scents. The coffee granules also give the tube a more natural, earthy color, resembling the appearance of a bass' preferred prey. These tubes are also salt impregnated for added effectiveness. When rigged with an internal tube jighead and exposed hook, the 3-1/2'' Coffee Tube with a hollow head is perfect for dragging, jigging, or fishing around structures.