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 JLBIHD621, JLBIHD622, JLBIHD624, JLBIHD625, JLHDA624, JLHDA625, JLHDA911, JLHDA912, JLHDA913, JLHDA101, JLHDA102 and JLHDA601.