Berkley CAPT-SMLT Power Bait Atomic Pulse Tube, Smelt, 1-1/2-Inch This atomic pulse tube features effective PowerBait scent and flavor attractant Ribbed design allows for 3 times more scent dispersion than a normal tube Ideal for crappie, panfish and trout Fish hang on longer for more positive hook sets Available in smelt color; measures 1-1/2-inch length