Gardener's Supply Company Cluster Buster, 5 Pack NATURAL- Non-toxic way to eliminate annoying cluster flies NO MESS- no chemical insecticides PRODUCT DETAILS- Long-lasting; each trap is effective for 2 to 4 years, trap contains eggshell and nontoxic lure. SAVE- when you buy the set of 5 traps instead of individually! MEASUREMENTS- 9-3/4" L x 1-3/4" W x 3" H