ITEM NAME:3 Pcs 5.5mm X 2.1mm DC Power Supply Metal Jack Socket Great ã€New OZ Item Description:5.5mm X 2.1mm DC Power Supply Metal Jack socket.3 x 5.5mm 2.1 mm DC power socket panel moun. Will suit 2.1/5.5mm DC Power Plug. Panel mounting. Single pole switch. Size: 2.1 x 5.5mm.