Long wondered whether I should buy the screen. At first, expensive, because the price is about half of my old 7 years "Prima5". Consider yourself what to tinker = pointless. In the screen a special fan nozzle + necessary is built. An adapter is included, probably for the larger models. Very useful as accurate spraying is possible, even in windy conditions can be worked (still watching the wind coming from behind), toxic stuff is not unnecessarily spread (shoes etc.). (Sprayed Tiefgrund and Sprühspritzer are still on the window frame) to have bought to deploy weedkiller on grass and then regretted not immediately buy the thing with. Recommendations: Larger people have to work at the screen / syringe combination and lawn spraying with stooped posture because, unfortunately, the spray bar is short. Those who repeatedly injected lawn and anyway has spinal problems and large should when a syringe including overtime still possible pick (there!). Extensions that I've found so far are all well for the bigger ones (professional?) Models intended (pipes with other thread). Screen easy to clean - not overly stable - but met fully its purpose. PS: The Gloria syringe I'm good friend because I now also for other equipment for comparison had (And: No, I'm not related to company or by marriage). Greeting SRV