Brand new, premium quality compatible air filter for your Nuaire ventilation appliance. Filter media rated: G3 ISO 45% Course. Formally known as G3, this filter will provide the required filtration. Alternative to original part code: 775631. Filter height (approx'): 30cm / 300mm. Filter width (approx'): 30cm / 300mm. Filters can be gently vacuum cleaned to extend their life. Pack of 1 filter. Filter colour may vary and will arrive as either pure white or blue/white.