Stadium Core Drill Black Hole Ventilator BM725
This core drill wall ventilator has internal anti draught fins and is adjustable to suit 228mm to 585mm walls
Use a 127mm - 5 inch core drill
External brown plastic vent measures 182mm x 155mm
Internal grill measures 155mm square - Comes with screws to secure to wall
Has an effective free area of 30cm2
Please note that all prices include 20% VAT