NCD I2C Cables make it easy to link devices together. Available in 6 sizes, based on your needs. Please note: The 3″ I2C cable is included with all Mini-Modules. The 6″ Cable length is included with all other NCD devices. We also have 12″ and 20″ cables available, but longer cables are not compatible with all NCD IoT devices. As a general rule, the I2C cable length should be as short as possible. For those willing to experiment, and perhaps reduce the clock speed of the I2C data bus, we also offer 3.25′ (1 Meter) and 6.5′ (2 Meter) cables. Please note that longer cable lengths are not typically recommended, and are offered strictly for experimentation purposes. In some applications, they may not work at all or may require you to lower the pull-up resistance on external devices by installing the I2C pull-up jumpers.