Regular replacement of the filters in your cooker hood will guarantee your kitchen fresh air, free from cooking odours and a more pleasant cooking environment. We recommend replacing the filter every 3 to 4 months, depending on the usage of the hood. 2 per pack for models JLBIHD620, JLBIHD920, JLBIHD623, JLBIHD923, JLHDA623, JLHDA923, JLISHDA901, JLHDA602, JLHDA915, JLHDA901.