Mine is the corrision guard one from Mission Beach Qld. You can bid on e-bay or buy direct buy now from the e-bay site . I have eight anodes in my car. Down low on rear guards in boot, same in back seat behind door above dog leg, one in the door and one on the rails half way along the engine bay. They are easy to wire up as everything you need is included. Just follow instructions. I used a total of eight. [one each side]