... , certification: 1, Hushun high and low water pressure switch is manufactured by a professional micro-switches and pressure switches ... whole. 2, High pressure ≥ 30Kg switch 3, Low water pressure start, blowing mouth can drive switch. Action force in 120g ± 10g ... Using environmentally friendly materials and products are environmentally certified. 6, Switch certification are: UL, VDE, TUV, CB, CCC, CQC, ...