The Promar Wire Bait Cylinders are a convenient way to add bait to shrimp and crab traps. These are made with wire mesh and have a removable lid with a clip, making it easy to fill with bait and attach to the inside of the a trap. This is easy to flush and clean when finished. Model # Dia. Length AC-366 3.5" 6" AC-369 3.5" 9"