As an Amazon Associate, we earn from qualifying purchases. Monsoon Grey 450mm Gravity Controlled Shutter (GS450) National Ventilation . GS450 Attributes Brand name, Manufacturer name, ManufacturerNational Ventilation Extra Product NameMonsoon Grey 450mm Gravity Controlled Shutter (GS450) extendedQty, qtyInStock0 moq, multiple1 MPNGS450 originalCurrency{'currency': 'GBP'} qtySourceupdateFromUrlEntry snippetMonsoon Grey 450mm Gravity Controlled Shutter (GS450). Fast and Free Delivery Available. Trade Quality with Low Prices. Distributor offers SellerSKUMOQIn stockMultiplePrices Electrical2goGS45011