There are a number of different copper bullets out there. I can only speak for Yew Tree copper, as they are the only ones I’ve used, but super in my experience.
Give Richard at Yew Tree a call and have a chat, he is a mine of information and will give you what you need to know.
Give Richard at Yew Tree a call and have a chat, he is a mine of information and will give you what you need to know.