These BioEdge Freshwater Fishing scent potions contain 100% natural oils, amino acids, enzymes and pheromones found in the bait from which they are extracted. Each is specifically formulated to smell and taste like natural bait. Just put a dab on any lure to increase fish strikes and hookups. Size: 2-oz. bottle. Available: Crayfish, Nightcrawler, Shad,Salmon Egg.