The product is a ceramic capacitor with the part number CAP CER 39PF 50V C0G/NP0 1812. It has a capacitance of 39 pF and operates within a voltage range of 50V. The C0G type indicates that it is a temperature-compensating ceramic, while NP0 signifies it is a Class I material with a low loss tangent. This capacitor features a metric case size of 1812, which translates to an imperial diameter of approximately 6.0mm and a height of about 1.6mm.