1.borosilicate
3.3 glass
2.manufacturer with ISO
3.Cheap price and high quality
4.packing:Carton 5.Tube,Beaker,Flask,MeasureCylinder,Reagent Bottle,Desiccator,and so on... 6.Series of disposable and reusable glassware, burning instruments,measuring instruments, reagent bottles, desiccators, multiple instruments and thick glasses...