Could someone please tell me the voltage rating of this cap. It's a greencap and the only marking is 2G104K. It's part of a voltage doubler in a bug zapper. It's dimensions are 50% larger than the 100V greencap that Tricky Dicky sells. If that's a help. I understand the 104K part so I guess the 2G is the significant bit but I didn't get anything useful from Google. A URL or good search words would also be helpful.
Thank you
Gordon