You'll note that Protocast Inc. offers a variety of alloys for us to work and cast with. These alloys come in three varieties: zinc, magnesium, and aluminum. Each kind of alloy has several metal grades that are appropriate for particular prototype tasks. Due to its durability and affordability, aluminum is a common material choice for metal casting, tooling, and production in general. This is because aluminum is used in numerous components in the automotive, aerospace, defense, and construction industries. Cast aluminum can even be used to make furniture!