The part number for this capacitor is CAP CER 2.1PF 100V C0G/NP0 0603, which specifies a capacitance of 2.1 pF with a tolerance of ±0.25pF and a maximum voltage rating of 100V. It has a ceramic construction in the C0G or NP0 dielectric type and is packaged in a 0603 (1608 metric) case size.