Cyper WSP is an economical insecticide that is non-staining and odorless. Packaged in an envelope with 4 water soluble packets. Cyper WSP is the best insecticide to kill scorpions, black widows and other spiders because it is a larger crystallized formulation. Use Sites: in and around buildings and structures, industrial buildings, houses, apartment buildings, laboratories, buses, and nonfood/feed areas of stores, warehouses, vessels, railcars, trucks, trailers, aircraft (cargo and noncabin areas only), schools, nursing homes, hospitals (non-patient areas), restaurants, hotels, and food manufacturing, processing, and service establishments. Effective Against: ants, aphids, bees, boxelder bugs, carpenter ants, chiggers, cockroaches, fleas, flies, mites, mosquitoes, silverfish, spiders, ticks, wasps. Ingredients: 40% Cypermethrin.