Stadium Anti Draught Black Hole Cavity Wall Ventilator BM720
This wall ventilator has internal anti draught fins and is adjustable to suit 290mm to 390mm solid or cavity walls
External red plastic brick measures 215mm x 115mm
Internal grill measures 290mm x 200mm - Comes with screws to secure to wall
Has an effective free area of 70cm2
Please note that all prices include 20% VAT