Replacement EL-60 glue boards for the Gardner GT-200, WS-85, WS-95 and various other manufacturers Wall Sconce fly light traps. Each board is white and measures 4′ x 17′. One pack of 10 glue boards. Gardner Wall Sconce Fly Light Bulbs should be replaced every 6 months to be most effective. Glue boards should be changed every 30-60 days. Glue boards may need to be changed more often in high infestation areas.