Brand: Philmore LKG. MPN: 12-665. Fiberglass substrate for long life for use with any frequency. Two ounce copper pads with a quality solder plating and solder masked for easy soldering without bridging. Board size: 1/8" thick, 2.126" width x 2.10" length. Also can be used as a solo Protoboard - will accommodate standard electronic components having wire leads; over 230 plated thru holes as well as an SOIC flatpack pattern (up to 14-pin), LED pattern and pushbutton pattern. Serves as a project shield for use with Arduino Uno. Hole patterns match exactly the I/O pads on two edges of the Arduino Uno and it will stack above the Uno using included header pins. Hundreds of different Arduino projects can individually fit nicely on this board.