... cooled with jets of cold air, inducing compressive stresses to the surface while the center remains tensile. FEATURES4-5 times stronger than annealed ... etc.THICKNESS5mm, 6mm, 8mm, 10mm, 12mm, 15mm, 19mm etc. TERMSCONDITIONSSizeAccording to the buyer's requirementThickness3mm, 3.2mm, 4mm, 5mm, 5.5mm, 6mm ... . Favorable price but good quality.7.Sincere after-sale service. Round Glass Table Top