1,Automatic waterproof connector 2,Electric metal connector 3,Screw couping mechanism 4,CE Certified Brand NameSaipModel ... mechanism 4,CE Certified 2012 New Electric Metal Waterproof Connector Introduction:X series mini-circular connectors with screw couping mechanism and ... ,small size ,quickly mating and unmating etc .3:X series small circular connectors with screw coupling mechanism and die-casting ...