... for GB3836.1,2,3-2000 ,IEC60079 standard request. HEAD LAMPApplication1.Used in Zone 1 and Zone 2 dangerous place ... aluminium alloy shell with plastic-sprayed surface.Pressure-casted formation ,compact structure and aesthetic appearance.Suspension type thumb nut is used ... lampRated voltage(V)220Rated power(W)250300175,250150,250175,250 HEAD LAMP