The 24 uPrint Modeling Bases by Stratasys are 7" x 9" substrate plate bases designed specifically for the uPrint by Dimension 3D printer. Made of ABS material in black color, these bases are compatible with a 1.75mm filament diameter. Manufactured in the United States, each base is a unit quantity of 24, providing a reliable and high-quality substrate for 3D printing applications. Ideal for professional use, these modeling bases offer a sturdy and compatible foundation for your 3D printing needs.