The socket and the face ply coordinate diameter: 12,16,20,24,28
Cornnector assembly type: P-Connector pin  S--jack
Core number: 2,3,4,5,6,7,8,9,10,12,14,15,16,17,18,19,20,24,26
Attachment plug type:A--attachment plug
                     D—90 degree attachment plug
                     K—docks style inserting the
                     E—flexible metal tube attachment plug
Socket type: B—four eyes flanges assemble fixed instalation of hexagnal C—nut queen                          
Material: Outer covering: adopt high grade copper zinc alloy, the nut linking up to adopt brass
          Insulator: adopt the black bakelite
          Contact the body: adopt high grade copper