I have the Fogzilla, along with the brite box. I need to replace the o-ring on right side fog. I tried getting in touch with the manufacture, who did respond, but with limited info. They told me I needed size 115 o-ring, I am assuming this outside dia. but what would the inside dia. be? I don't want to keep running back and forth to the hardware store. It has been 2 weeks without a response from them... . TIA, Scott