The capacitors in question are specifically CAP CER 56PF 50V C0G/NP0 0201. They have a capacitance of 56 picofarads with a tolerance of ±10 percent and can handle voltages up to 50 volts. The ceramic material used is classified as C0G or NP0, which has specific properties such as high stability over temperature and frequency. The capacitors come in the metric size 0201 (equivalent to 0603 in imperial measurements).