Manufactured with top quality 3.3 borosilicate glass.To be used in rotary evaporator. 3.3 borosilicate glass is a low alkali borosilicate composition.It is virtually free of magnesia-lime-Zinc group and contains only traces of heavy metals. These glassware is highly resistance to water,neutral and acid solutions,concetrated on acids and their mixtures as well as to chloride,bromine,iodine and organic matters. Even during extended period of reaction and at temperatures above 100 Celsious,its chemical resistance exceeds of most metals and other materials.It can withstand repeated dry and wet sterilization without surface deterionation and subsequent contamination.Resistance to attack of various chemicals is shown under.Only hydrofluoric acid,very hot phosphoric acid and alkaline solutions increasingly attack the glass surface with rising concentration and temperature.