Glidevale Maxi Vent Periscopic Vent MV251
Glidevale MV251 periscope vent is part of a range of glidevale products for ventilating underfloor areas and cavity walls. This MV251 vent provides vertical adjustment for 3 to 4 courses and is can connect directly to the MV250 airbrick. Suitable for cavities from 50mm to 100mm.