Aluminum ventilation grill 781D-RC3

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36% free ventilation cross-section Elliptical slat Burglar-resistant Protection class RC3 Assembly enclosed according to manufacturer specifications Dimensions up to 2x2m possible The weather protection grid, System 781D-RC3, from MLL Hamburg, is a burglar-resistant, RC3-tested ventilation grid made of aluminium with a free ventilation cross section of 36%. You can gain security and still not have to do without fresh air or ventilation in a room or building. Thanks to the reinforced MLL slats, penetration into the inside is prevented to the greatest extent possible. The system 781D-RC3 is equipped with an elliptical slat in a reinforced Frame 702. MLL-Ventilation grid type 781D - RC3 MLL - heavy series, RC3 tested Elliptical extruded profile, 80 mm MLL-Slat D80 in Frame 702 (Frames and slats in a reinforced design) Surface : RAL according to choice / unfinished Special colors on request Scope : Burglar-resistant ventilation grid. Assembly enclosed according to manufacturer specifications Area of Application : For indoor and outdoor use. Struture : Pre-assembled frame with slats Required Accessory : Fasteners according to the installation situation Optional Accessory : Fly screen: Fibreglass mesh 1,4 mm / Stainless steel mesh 1,4 mm Bird protection: Galvanized mesh 10 mm / Stainless steel mesh 8 mm