Kossel Max 310mm Platform Plate of 3D Printer Kit Delta Kossel Max 310mm Borosilicate Glass Plate 310MM Round Glass Plate 3mm Thick Borosilicate Glass Board for Rostock Delta Heated Bed High Quality Borosilicate Glass Plate Very Good for Rostock Max Printer Round 310mm Diameter 310mm Borosilicate Glass Platform Work for 3D Heated Bed