Conn Unshrouded Header HDR 28 POS 2.54mm Solder ST Thru-Hole Poly Bag. BergStik®, Board to Board connector, Unshrouded Header, 2.54 mm Pitch, Vertical, Double Row,Through Hole, 26 Positions. Bergstik Headers UNSHROUDED 2ROW STRT THRU HOLE 28POS.