National Ventilation 136-25M 5 Inch White Steel Extract Diffuser

The valves are constructed from white epoxy finished steel and are supplied complete with a bayonet action fixing frame. This allows positive locking and sealing of the valve yet still enables easy removal for adjustment or cleaning.

The valve profile is designed to eliminate fouling of adjacent decorated surfaces. The central core is adjustable and offers a wide range of settings to meet specific system designs.