The capacitor is a CAP CER 18PF 1.5KV C0G/NP0 type with a capacitance value of 18 pF and a tolerance of ±5%. It has a working voltage of 1500V (1.5kV) and is a ceramic device classified as C0G, also known as NP0 (1B). The package size is designated as 1808, which corresponds to the metric size 4520.