0.4mm; http://ww1.microchip.com/downloads/en/devicedoc/atmel-8235-8-bit-avr-microcontroller-attiny20_datasheet.pdf#page=208 WLCSP-16, 1.409x1.409mm, 16 Ball. -5.47736 19.9508 facet normal -9.964601e-01 -8.406740e-02. New Pull Request
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