Package includes 1 Glass Plates for your convenience when you are printing different materials / models and help you to remove the finish models very quickly from the printer and protect the original print bed. Glass is a universal print surface for 3D Printing. Almost all types of filament will print to glass in one way or another. Just place the glass on your print board and clip it in place with any 3D printing tape on! This glass has been specially ordered and modified for use in 3D Printers. This type of glass is not available at your local hardware store or big box home center. Size: 10" x 11" x 0.125" (260mm x 280mm x 3mm) w/ the cutting corner, good fit for all Builder 3D Printers.