1.25mm Pitch 4-pin Cable Matching Pair - 40cm long - Molex PicoBlade Compatible
Brand: Adafruit
When 0.1" is too big, and JST PH's too chunky, these ultra-slim 1.25mm connectors are a reliable alternative. These are only 1.25mm pitch, but have a nice clicky connection.
$1.95 AUD, inc GST