You get over the counter brands at autozone. I carry a professional grade 4 oz. elastic claybar. I also have a claybar kit that has the claybar lube and claybar together. You can also use the clay lube as a quick detailer.

My claybar and kit is located on this page at the bottom.. http://www.obsessivedetail.com/carwashanddetailers.html

Let me know if you have anymore questions. I will be glad to help!