KONK 418D is one of the original KONK products. 418D contains 1.8% Pyrethrin for control of flies, gnats and mosquitoes. Once you place the product in your KONK dispenser (sold separately), it will dispense 418D every 7.5 minutes to give you a reduced flying insect population within a few hours. This spray covers an area of 170 cu. m. for up to 30 days. Simple to install and maintain. Instructions allow you to use this product safely and control your flying insect problems.