Brass is an alloy of copper and zinc, the proportions of which can be varied to achieve different shades of brass; it is generally a bright gold colour, but also comes in dark silver (gunmetal) and reddish (rose gold) varieties. Brass is very malleable yet is very strong once formed, which makes it ideal for intricate body jewellery pieces such as high-detail plugs, tunnels and hangers. It is resistant to corrosion (meaning that it will not rust) and exhibits low friction, making it comfortable to insert and remove the jewellery. All brass jewellery from Paradox is lead free, and copper is a natural antimicrobial, meaning that it and it's alloys (in this case, brass) will naturally kill a wide range of harmful bacteria.