307 Series (.156" (3.96mm) contact spacing) Card Edge Connector with 50 Wire Hole type contacts with gold plating on the contact area. The tails are .087" x .013" (2.21mm x 0.33mm) thick and .282" (7.16mm) long in a Double Row formation, reading both sides of the daughter board. The Insulator is Green in color with ∅.128" (∅3.25mm) Mounting Holes.