The ST3215SB series is a simple tuning fork crystal with dimensions of 3.2mm x 1.3mm or 2.0mm x 1.2mm. Standard initial frequency tolerance is +/-20 ppm, and Motional Resistance is 70 kOhm or 90 kOhm. Kyocera is offering 12.5pF, 9pF, 7pF, and 6pF as typical load capacitance values. Specification is negotiable; users are encouraged to contact Kyocera Electronic Devices with specific requirements.