As an Amazon Associate, we earn from qualifying purchases. Monsoon Grey 550mm Gravity Controlled Shutter (GS550) National Ventilation . GS550 Attributes Brand name, Manufacturer name, ManufacturerNational Ventilation Extra Product NameMonsoon Grey 550mm Gravity Controlled Shutter (GS550) extendedQty, qtyInStock0 moq, multiple1 MPNGS550 originalCurrency{'currency': 'GBP'} qtySourceupdateFromUrlEntry snippetMonsoon Grey 550mm Gravity Controlled Shutter (GS550). Fast and Free Delivery Available. Trade Quality with Low Prices. Distributor offers SellerSKUMOQIn stockMultiplePrices Electrical2goGS55011