This set contains 31 images files as shown on preview page, wich includes 16 color images and 15 black line versions. Images saved at 300 dpi in png files.Check out these related clip art set:Layers of the EarthGravity Clip ArtAstronaut KidsSolar SystemSolar System FriendsI also have quite a complete selection of clipart in the following bundles:Earth Science - Geology Mega BundleEarth Science - Geology Mega Bundle 2Monsters BundleUFOs and Aliens Bundle☆ Click to follow me to get freebies and up