0B, 2pin.4pin cylindrical metal connector B Series connector with the following main features: 1) Security of the push-pull self-latching system; 2) Multicore types with 2 to *2 pins; High-density installation for space-saving; 3) Soldering,crimping and PCB contacts 4) Straight or elbow (*0 degree) 5) Multiple key options to avoid mismating between similar connectors; 6) ***-degree screening for full EMC protection 7)Keying system(G is standard key) for connector alignment