This assorted materials set includes 69 high-quality (300 dpi), transparent, PNG images. These are the the exact same images found in the Electrical Conductors & Insulators set and Thermal Conductors & Insulators set. The only difference is that, in this set, they are sorted based on their magnetic properties and a couple items have two versions (magnetic and non-magnetic) to increase your choices. The following items come in color, grayscale, and lineart: Magneticiron nailiron spoonsteel keyst