Specification: Capacity: 250ml; Minimum Scale Value: 25ml; Material: Borosilicate Glass; Max Temperature: 400 Celsius Degree; Overall Size: 70mmx99mm / 2.76x3.9 Package Contents: 1 x Glass Beaker for scientific chemistry industry engineering laboratory quality testing sampling research Scientific boiling thickness distribution Instruction: Just put the material inside it and heat, the beaker can adapt to rapid changes in high and low temperature. Advantages: Borosilicate glass material has good heat and corrosion resistance, durable to use. Made with tapered sides and a pour spout, easy to pour out the melted materials. High light transmittance is helpful for you to watch the reaction inside the beaker. Convenient to pour the liquids through the pour spout. The surface is smooth and the scale is clear, which is convenient for measuring the volume of liquid. Notice: a. When heating the beaker, place a mesh under it to heat it evenly. b. When it is used for dissolving, the amount of liquid should not exceed 1/3 of the volume of the beaker. When stirring, do not touch the bottom or walls of the cup. c. When the liquid is heated, do not exceed 2/3 of the volume of the beaker. d. When heating corrosive chemicals, a watch glass should be covered on the mouth of the beaker to avoid liquid splashing