Catchmaster, 4 Pack, Gold Stick Fly & Wasp Catcher, Use In Homes, Garages, Offices, Kitchens, Laboratories, Stables, Barns & Inside Garbage Cans Or Containers, Designed To Attract Multiple Fly Species, Place Traps On Window Sills Or Hang Them In Areas Of High Fly Activity, Hook Included For Hanging, Will Remain Effective For Months, Indoor & Outdoor Use, Ready To Use & Disposable, Non-Toxic.