The part number is CAP CER 1.8PF 25V C0G/NP0 01005, which refers to a specific type of ceramic capacitor with the following characteristics: capacitance value of 1.8 pF, ±0.1pF tolerance, and a working voltage of 25V. The C0G/NP0 designation indicates that it is a temperature-stable ceramic capacitor, while the metric size code "01005" or "0402" signifies its dimensions.