Catchmaster 909 Replacement Fly Light Glueboard (12/bx) is designed to effectively capture flying insects in various insect light traps. Each box contains 12 glueboards, each measuring 16.375 inches by 9 inches, and can be perforated to create two smaller boards. Enhanced with attractants and UV inhibitors, these glueboards provide reliable insect control in residential, commercial, and industrial settings.