Hi I am Mark Williams and on behalf of Expert Village and the producer of this series you can visit our website at www.williamspictures.net. I'm going to talk to you about some of the different kinds of chemicals that we got here and specifics. This chemical right here is made by Santeen it is a de-liming agent. It is one gallon usually used to clear away the lime in the toilet that is built up from urine deposit. You pour the whole thing in there. This is a organic chemical and well get to that later. This is Lime Away and CLR another lime and scale and rust remover. You can get this at your grocery store, at hardware stores, department stores. This is another product by Santeen this is a chrome and tile cleaner. The name says it all. This is Comet. This is more abrasive chemical I don't recommend using it because it can scratch your cast iron porcelain finish, it can scratch the vitreous china finish; I don't recommend it at all.