This is a 1206-sized ceramic capacitor with the designations CAP CER 1PF 100V C0G/NP0. It has a capacitance of 1 pF and a tolerance of ±0.5 pF, with a maximum voltage rating of 100 V. The capacitor is part of the C0G or NP0 family, which are known for their stable temperature characteristics and low loss factor.