A piece Borosilicate glass meant for use on the bed of a 3D printer. This plate is the prefect print for ABS, why because while printing ABS will plate reach temperature 100-110 degree and thinner plate will curve eventually and 6mm plate can solve this issue and have a better quality print. If you need further question do ask www.ev3dm.com 

Specifications are as follows:

Material: Low Expansion Borosilicate Glass

Size: 214mm (+/-1.0MM) x 214mm (+/-1.0MM)

Thickness: 5 mm

Edges: Ground with machined beveled

Temperature rating = 500 degrees F (260 C) for maximum continuous operation