Strike King 3.5" Pro Model Coffee Tubes, 8 PK, Natural Goby - CT3.5-29 The Coffee Tube 3.5" Regular Pro-Model has a 3.5 inch hollow body and can be rigged with an internal tube head jig for dragging, jigging or fishing offshore structure with the hook exposed. The Coffee Tube is scented with real coffee bean granules and coffee bean oil. Coffee granules give the tube a more natural earth tone tint that mimics the appearance of a bass' favorite prey. They are salt impregnated too. As a result these Coffee Tubes will help you catch more fish.