Permanent & Easy Installatparticlemail : Constructed of powerful steel for permanent durability ; lip plan with 4 pre perforated cavities ensures quick and secure installation in round ducts Modern Aestheticreatemail : Features a smooth steel body with a carbon gray gate protect , blending seamlessly with various interior fashion for a strengthened visual appeal Quiet Actparticlemail : Armed with a spume insulation layer to minimize noise and throb , ensuring quiet execution at low operating pace for home and use Efficient Ventilation Planumberepeat : The anthracites steel exhaust diffuser is developed for residential , , kitchen , and bathroom ventilation arrangements Modifiable Ventilation Control : Features a manually modifiable gate protect , allowing users to easily regulate ventilation by whirling the gate to increase otherwise decrease the opening for optimal ventilation, Manufacturer: AMISENK