1.25mm Pitch 4-pin Cable 20cm long 1:1 Symmetric Cable - Molex PicoBlade Compatible
Brand: Adafruit
When 0.1" is too big, and JST PH's too chunky, this ultra-slim 1.25mm connector cable is a reliable alternative. These are 1.25mm pitch but have a nice clicky connection.
$1.85 AUD, inc GST