... original one. replacement part number: E1-12,E3-12,E5-12,E7-12,E9-12;E1-16 ... E3-32,E5-32,E7-32,E9-32 E1-36,E3-36,E5-36,E7-36,E9-36;E1-40,E3-40,E5-40,E7-40,E9-40 ... E1-44,E3-44,E5-44,E7-44,E9 ... -44;E1-48,E3-48,E5-48, ... (filter element foreliminting oil and odour):0.01 E3 grade(hyper efficient filter for eliminating oil):0.01 ...