The rentokil window fly screen is a reuseable mesh fly screen that is almost invisible on a window it is designed to prevent flies wasps moths mosquitoes and other flying insects from entering the home whilst allowing windows to be open the screen is easy to install and is ideal for kitchens and conservatories protects up to 30 cubic metres mesh size 15 square metres how to use measure out the fastening strip supplied and attach to window frame cut mesh to the right size and press into place on