This double sided fly trap is designed to tackle the most sever fly infestations. At 46 square feet of catching power, the Spider Web® Fly Glue Trap catches hundreds of thousands of flies and other flying insects. The Spider Web® combines a pre-baited glue formula with a highly attractive florescent chartreuse color. The double sided roll easily unrolls to be hung vertically or horizontally for use in barns, greenhouses, chicken, sheep, hog, enclosures, garbage rooms or wherever flies are present in large numbers. Made in the USA.