This is a mica capacitor with a capacitance of 0.003 microfarads (3 nanofarads) and a voltage rating of 500 volts. It has a tolerance of 2% and measures approximately 17.3mm in length, 7.1mm in width, and 14mm in height. The capacitor features radial mounting leads, an 8.7mm lead spacing, and a maximum operating temperature of 125°C.