1,Payment have T/T,L/C,D/P 2,Tracking service 3,ISO,IEC,CE,GB,BS 4,Material is plastic or iron 5,Low price MERCURY SWITCH1.Rated current of mercury switch:25A, Rated voltage:230V.2.Protection grade of shell:IP62.3.No harmful effect for shell weeping in vertical direction within 15'' gradient 2012 new type Water-proof Anti-interference Float Switch