The Bell Ringer 10ml combo pack is an isobutyl nitrite solvent cleaner from Poppers Los Angeles that will clean with all the bells and whistles you desire. Hell Fire, Pig Sweat, Crypt Tonight and RUSH original are all contained in this combo and what a foursome they are! They come in 10ml bottles and a 30ml version will be here soon. Years ago, the headmaster would gather all of his boys together by ringing his big bell by hand. They would all gather around him to see what a pleasure it would be to clean alongside of him. He taught them how to clean fast and deep and they were all smiles afterwards, knowing that they had learned just how hard it is to get a bell-ringing clean. These are not for little ones and keep out of direct sunlight. Clean studiously.