7 components; 1000mg/l each of Fluorides (F-) ; Chlorides (Cl-) ; Nitrites (NO2-) ; Bromides (Br-) ; Nitrates (NO3-) ; Sulphates (SO42-) ; Phosphates (PO43-) in Water 250 ml Certificati ISO 17034 / ISO 17025 - Validita 24 mesi