Truma E2800 or E4000 Heater Vent / Guard.
Truma Grille for EW 28/40 II, to be used for heating E2800 or E4000.
Commonly used grate / chimney grate / ventilation grille in Karmann campers (including Gypsy and Cheetah). They sometimes break due to UV light, heat and accidents. They are hardly available anymore. But since 2019, there is the exact copy of 3D Classics. Unscrew the old one, also cut off any existing kit, screw on the new one. It is as simple as that. Made of recyclable ABS and easy to spray over with primer and car paint in the desired color.