The 22-28-4040 is a 4-way 1-row KK? 254 Vertical Breakaway Header with tin-plated (Sn) brass contacts, 2.54mm pitch, 6.09mm mating pin length, through hole and black high temperature thermoplastic housing. This vertical breakaway header is suitable for board-to-board, signal and wire-to-board. Mates with 2695, 6471, 7880 KK? crimp housing and 4455 KK? PC board connector.