Check the listing for details. SafeAMP Glue Boards Refill Compatible With KATCHY® and FENUM® Indoor Insect Trap. Color: White, Condition: New. Listed at 8.99 USD. [Compatibility] Compatible with most mosquito traps with a round insect storage box on the market. Note these gluepads can be used without its device as a "sticky trap". Simply place on windowsills, etc. However, it is not double sided sticky. It is sticky only on one side. Can be cut into triangles and placed in pots and plants to catch those gnats![Circle Glue Boards] Diameter of the glue board is 4.13 inches. [Premium Quality] Super sticky trapping and killing the bug without noxious chemicals. [Frequency Of Replacement] One board can be used for about a week, depending on how many insects fly around your home. Enough supply for 3 months of use. [Easy to Apply] Hold the handle and quickly peel off the covering paper; Put the pad on the tray of your mosquito lamp; Keep the sticky side up and close the mosquito killer, then you can start using your mosquito repelling devices.[Friendly Customer Service] Please feel free to contact us if you have any questions about our products, we'd like to help you![Compatibility] Compatible with most mosquito traps with a round insect storage box on the market. Note these gluepads can be used without its device as a "sticky trap". Simply place on windowsills, etc. However, it is not double sided sticky. It is sticky only on one side. Can be cut into triangles and placed in pots and plants to catch those gnats![Circle Glue Boards] Diameter of the glue board is 4.13 inches. [Premium Quality] Super sticky trapping and killing the bug without noxious chemicals. [Frequency Of Replacement] One board can be used for about a week, depending on how many insects fly around your home. Enough supply for 3 months of use. [Easy to Apply] Hold the handle and quickly peel off the covering paper; Put the pad on the tray of your mosquito lamp; Keep the sticky side up and close the mosquito killer, then you can start using your mosquito repelling devices.[Friendly Customer Service] Please feel free to contact us if you have any questions about our products, we'd like to help you!