Double-Sided Yellow Insect Monitor Cards for Whiteflies, Aphids, Fungus Gnats (10-Pack) Great for Flowers and Vegetables Non-Toxic, No Mess and Easy to Use Double-Sided - 2 sided Yellow to maximize catch rates 4" x 8" Perforated traps to increase the use options, use indoors or outdoors 1" Monitor Grid for Easy Insect Identification, Great for Greenhouses Traps are packaged as 10 double-sided cards per pack.