Conical flask Descripation: with the fast development of chemical industry, it is stronged required that antispetic technology for equipments for chemical industry must be used. our conical falsk usedBorosilicate GlassAlkali resistance, Acidproof.widely use for lab in school, factory, hospital. capacity: 25ml, 50ml, 100ml, 150ml, 200ml, 250ml, 300ml, 500ml, 1000ml, 2000ml, 3000ml, 5000ml, 10000ml SiO2 80.5% Min B2O3 12.75% Max Al2O3 2.0 %Max R2O 4.4% Max Coefficient of linear expansion 3.3*10-6(20-300) Properties of heat-resistance and fast change 260-280 Water tolerant One grade Alkali resistance Two grade Acidproof One grade.