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Adafruit PCB Ruler v2 - 6 : ID 1554 : $4.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Amazon.com: Treedix 2PCS Multifunctional PCB Ruler 3inch Measuring Tool Color Wavelength, Schottky Diode, Zener Diode Resistor Capacitor Chip IC SMD Diode Transistor for Electronic Engineers Printed Circuit Board : Tools & Home
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