At 24 in. high, the Catchmaster Gold Stick Fly Trap offers a full 96 square inches of catching surface. Use in homes, garages, offices, kitchens, laboratories, stables, barns, inside garbage cans or containers, or any location where a heavy fly population is present. Designed primarily for professional, agricultural and outdoor applications. Is safe to use in sensitive areas as it contains no toxins, insecticides, hazardous chemicals, vapors or offensive odors. Gold Sticks are clean, long lasting and effective in high and low temperatures, both indoors and out. Multi-Bait Attractant is designed to attract multiple fly species.