The 7F26000E12UCG with SMD Crystal Resonators SMD-2016_4P RoHS is a surface mount device (SMD) manufactured by SJK. This device is a piezoelectric crystal resonator, and is made of a quartz crystal material with a metal enclosure. It has a 12 MHz frequency, and is RoHS compliant. It contains four pins that are spaced 1.6mm apart, and its metal cap is 2.0mm in thickness. It has excellent shock and vibration characteristics, and can be used for timing applications.