387 Series (.156" (3.96mm) contact spacing) Card Edge Connector with 52 P.C Tail type contacts. The tails are .025"Sq' (0.64mm Sq') and .150" (3.81mm) long in a Double Row formation. The Insulator is Black in color and has Flush Mounting Lugs with Ø.128" (Ø3.25mm) Mounting Holes.