This is a ceramic capacitor with the following specifications: CAP CER 91PF 200V C0G/NP0 0805. It has a capacitance of 91 pF and can withstand up to 200V. The C0G/NP0 type indicates that it is a temperature-stable capacitor with low loss. The 0805 size refers to its dimensions, measuring 2.0 x 1.25 mm.