Electronics123.com, Inc. Force Sensitive Resistor - Square
Dimensions:<br> Overall length: 3.5"<br> Overall width: 1.75"<br> Sensing area: 1.75x1.5"<br><br>Click link for datasheets:<br>http://www.electronics123.net/amazon/datasheet/fsrguide.pdf<br><br>https://www.sparkfun.com/tutorials/269