The specified capacitor is a CAP CER 18PF 100V C0G/NP0 1808. Its characteristics include an approximate capacitance of 18 pF, with a tolerance range of ±1, and it can withstand voltages up to 100 volts. This ceramic capacitor falls under the C0G/NP0 classification and has a metric size designation of 4520 (1808 in imperial units).