@cass This information was pulled from Congrevapes web site:
PARTS KIT:
The parts kit for the DOG3 is generous like the other Doge Family of products. The Dual center post block in Stainless Steel is not included in the parts kit. Because of the high cost of making the component and the low demand for it, we have instead included our single hole stainless steel center post in the parts kit, along with stainless steel screws and hardware for anyone concerned about copper in their RDA. For customers who desire the Dual hole Stainless Steel center post, it can be purchased seperately on CompetitionScrews.com
Remember, the copper used in all Congrevape products is C110 lead free copper. It is the highest grade safety that we can provide our users. No company can ever provide a completely risk free environment, but a major tenant of Congrevape designed products is that we research the best materials to put in our equipment, such as only using certified C110 copper to reduce exposure to lead, and Ceramic, to reduce exposure to formaldehyde.
http://congrevape.com/projects/dog3/