As an Amazon Associate, we earn from qualifying purchases. Monsoon Grey 400mm Gravity Controlled Shutter (GS400) National Ventilation . GS400 Attributes Brand name, Manufacturer name, ManufacturerNational Ventilation Extra Product NameMonsoon Grey 400mm Gravity Controlled Shutter (GS400) extendedQty, qtyInStock0 moq, multiple1 MPNGS400 originalCurrency{'currency': 'GBP'} qtySourceupdateFromUrlEntry snippetMonsoon Grey 400mm Gravity Controlled Shutter (GS400). Fast and Free Delivery Available. Trade Quality with Low Prices. Distributor offers SellerSKUMOQIn stockMultiplePrices Electrical2goGS40011