4 Gravity Shutter EX007B

100MM/4 Gravity Shutter - Black EX007B Ideal fuss-free solution when you need to install a hole in an external or internal wall. Suitable for use with 4”/100mm fan via round ducting. For use with 4”/100mm fans Compatible with 4”/100mm round rigid or flexible ducting Prevents backdraught air and rain penetration Prevents objects of vermin entering when the ventilation is not in operation Dimensions (H x W x D): 152 x 152 x 60.5mm Manufactured from polycarbonate 1 Year warranty