The Patriot RDA is made of high grade 303 stainless steel and has a unique design on the removable top cap. The top cap design on the Patriot RDA, allows radiant fin shields to reduce the heat by 50%. The 3 post design allows you to build dual or quad coil and blow some serious clouds! The Patriot RBA has a dynamic quad ring seal to prevent leaking. The Patriot RDA precise zero resistance press fit posts so that you do not get any voltage drop and constant power to the dripper.