The part number is CAP CER 0.3PF 200V C0G/NP0 0603, with a capacitance of 0.3 pF and ±0.1pF tolerance at 200 volts DC voltage rating. This is a ceramic capacitor with the C0G, NP0 (1B) dielectric and a metric case size of 1608 or 0603 in imperial units.