306 Series (.156" (3.96mm) contact spacing) Card Edge Connector with 18 Wire Hole type contacts with gold plating on the contact area. The tails are .087" x .015" (2.21mm x 0.38mm) thick and .282" (7.16mm) long in a Single Central Row formation. The Insulator is Green in color with .344" (8.74mm) Offset Card Guides.