100 x Roofing & Cladding Screws 5.5 x 51mm Self Drill Ironmongery Air bricks to be used

Air bricks to be used in conjunction with cavity sleeves for ventilation through external walls to a building interior

Red swift breeding nest brick box

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2 x Starter units

100 x Roofing & Cladding Screws 5.5 x 51mm Self Drill Ironmongery Air bricks to be usedProduct Description Roofing & Cladding Self Drilling Screws Pack of 100 Premium self drilling roofing and cladding screws. Size: 5. 5 x 51mm. Washered self driller with hex head for a 8mm socket. For fixing cladding and sheet steel to steel purlins. Zinc plated Elementech coating for superior anti corrosion salt spray tested to 1000 hours. The 16mm rubber washer beneath the aluminium flange expands under pressure and forms a permanent weather seal.