As an Amazon Associate, we earn from qualifying purchases. Monsoon 100mm In-Line Twin Blade Damper (FD100) National Ventilation . FD100 Attributes Brand name, Manufacturer name, ManufacturerNational Ventilation Extra Product NameMonsoon 100mm In-Line Twin Blade Damper (FD100) extendedQty, qtyInStock0 moq, multiple1 MPNFD100 originalCurrency{'currency': 'GBP'} qtySourceupdateFromUrlEntry snippetMonsoon 100mm In-Line Twin Blade Damper (FD100). Fast and Free Delivery Available. Trade Quality with Low Prices. Distributor offers SellerSKUMOQIn stockMultiplePrices Electrical2goFD10011