... glass -pyrex glass,withstand over 600 C - use for fireplace,sight glass,light etc -many size 3.3 tempered flat ... wide applications:1). Household electrical appliance (panel for oven and fireplace, microwave trayetc.);2). Environmental engineering and chemical engineering (Lining layer ... : 820±10 O CContact Huhu for good price,15953257075 fireplace door glass tempered 3.3 flat borosilicate glass