Byson Gravity Grilles with Round Flange, Gray Plastic - For Extractor Plate Fans Neck size:12.5 x 12.5 inches Elegant Smart Dimming – Wide

Elegant Smart Dimming – Wide dimming range with fade-on and fade-off for smooth

designed to provide an effective barrier against weeds while allowing air and water to permeate through to your plants

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Quick assembly saves installation time and cost

Byson Gravity Grilles with Round Flange, Gray Plastic - For Extractor Plate Fans Neck size:12.5 x 12.5 inches Elegant Smart Dimming – WideProduct Description Upgrade your ventilation system with our high performance Byson Gravity Grilles with Round Flange, Gray Plastic For Extractor Plate Fans. Designed to complement plate extractor fans, this external louvered grille automatically opens with airflow and closes when idle preventing cold drafts, rain ingress, and pests from entering. Ideal for domestic, commercial, and industrial exhaust applications, the grille is made from durable, UV