Gardner's EL-61 replacement insect glue boards are designed to fit Gardner GT-180, GT-200, GT-215 & MX360 UV Fly Light Traps. The glue boards are not just limited to Gardner branded insect light traps and fit various other brands.The glue boards are an economical solution as you can also cut the fly boards into smaller pieces to be used in many of your smaller insect light traps. The glue boards have grid lines making it easy and convenient when counting the captured insects, and when cutting for smaller fly lights.