120 mm ventilation grille with insect screen, 304 stainless steel non-return valve, weatherproof, 120 mm for ventilation duct duct

【More uniform wind direction】120mm ventilation grille with insect screen. In addition to the original 4 bars, it has been extended to 7 bars which can effectively prevent the infiltration of insects and small animals, more uniform wind direction, and better air circulation. 120mm ventilation grille with insect screen. Suitable for indoor and outdoor use.【High-quality materials】120mm ventilation grille with insect screen; our products are made of rigorously selected stainless steel, resistant to rain, mosquitoes, birds, and rodents, wind and rain backdraft; all four sides are aligned, sharp, and unfavorable.【Suitable for many occasions】 Ventilation grille with insect protection. Suitable for indoor and outdoor use. This ventilation grille is suitable for extraction ducts, pipes, tumble dryers, bathrooms, kitchens, garages, cooker hoods, and vents. The stainless steel extraction grille with movable blades prevents water infiltration, and the round rear connection prevents water backflow.【Appropriate size】The 304 stainless steel weatherproof grille with non-return valve can be used for ventilation ducts with a diameter of up to 120 mm. The stainless steel ventilation grille covers the ventilation duct opening and prevents rainwater infiltration while ensuring proper ventilation. 120mm diameter ventilation grille for HRV ducts. Suitable for indoor use.【Easy installation】The entire installation process takes only a few minutes. Simply insert the ventilation grille into the duct or vent pipe, then screw four screws into the wall to install the assembly.