White Gravity Flap Air Vent & Back Draught Shutter 4 Inch Fascia Joints and run into the gutter

and run into the gutter as normal

White Hooded Cowl Vent & Back Draught Shutter

A solid stand will not blow over like cheaper lighter ones

The telescopic feature enables it to be adjusted between 3 and 5 brick courses  with vermin grill

The Ridge End Caps provide durable protection at each end of the ridge

White Gravity Flap Air Vent & Back Draught Shutter 4 Inch Fascia Joints and run into the gutterProduct Description White Air Vent & Back Draught Shutter For 4 Inch (100mm) Extractor Fan Ducting Gravity Flap Vent Wall vent with gravity flaps and weather sill. Helps prevent backdrafts. Manufactured with UV stable materials to reduce colour fade. Dual fitting for round 100mm (4 Inch) ducting or square ducting. Overall size: 140mm x 140mm. British made. ABS thermoplastic. Complies with Part F building regulations. Suitable for commercial and