The specifications for the CAP CER 2.1PF 100V C0G/NP0 0603 include a capacitance value of 2.1 pF with a tolerance of ±0.5pF, and they operate within a voltage range of 100V. This capacitor is made from ceramic materials classified as C0G or NP0 (1B) and is packaged in the metric size 1608, equivalent to the 0603 size in imperial units.