Ubbink's UB17 slate space vent is a roof void ventilator for use in slates. The base as supplied is a direct replacement for a 600mm x 300mm slate. When the 25mm side bands are trimmed off and the inner set of fixing points is used, the unit is then a direct replacement for a 500mm x 250mm slate.
The UB17 unit has a free vent area of 10,000mm²
This is supplied with A UB17 Connector & Pipe.