Prop-It Portable Magnetic Dry Erase Music Staff Easel Set Up Dimensions: 18" x 24" x 15" Includes: 30 3/4" Magnetic Disc Notes (10 black (Naturals), 10 blue (Flats), 10 red (Sharps); Black Dry Erase Marker & Eraser Collapses flat to 18" x 24" for convenient portability and storage Made of sturdy lightweight fiberboard with a non-metal magnetic, dry-erase surface.