These Board to Board QTH Series SMT 0.5 mm pitch High Speed Ground Plane Headers have 0.25 μm Gold plated contacts and Ground Plane with Matte Tin plated tails. This range of Board- to-Board QTH Series SMT 0.5 mm pitch High Speed Ground Plane Headers are available with various body heights which gives a range of stack heights when mated with the corresponding QSH Series Sockets, see stock number 767-8701 typical. The design of this range of Board to Board QTH Series SMT 0.5 mm pitch High Speed Ground Plane Headers includes Alignment Pins.