ULAB Heavy Duty Glass Beakers, 6pcs of Vol.250ml(8.45oz), Borosilicate 3.3 Glass, Thick Wall Beakers, with Double Scale, Superior Durability &

ULAB Heavy Duty Glass Beakers, 6pcs of Vol.250ml(8.45oz), Borosilicate 3.3 Glass, Thick Wall Beakers, with Double Scale, Superior Durability &

6pcs of 250ml (8.45oz) heavy duty glass beakers. 3.3 Borosilicate glass, Uniform wall thickness, double scale graduations. Extra large marking spot. Tolerance is approximately +/- 5%. Conformity to standards of ISO 3819. Please understand that as the glassware are fragile, the damage will occur during the transit. You can do the following options once got broken product.
1. Contact us for refund. ( If the remaining items are enough to use)
2. Contact Amazon for replacement. ( If replacement is required )

Including 6pcs of 250ml (8.45oz) heavy duty beakers, made in 3.3 Borosilicate glass material, Low Form with printed double scale graduation.

These beakers will withstand repeated standard autoclave cycles of 121°C at 15 psi for 5 minutes.
They are designed for heating by hot plate, flame, oven, microwave or heating mantles.
In normal service it can be heated many times to 230°C. It can be heated one time to 490°C in extreme service.
This product can be cooled to -230°C. DO NOT plunge product directly into a liquid coolant.
Place the product in the vapor phase of the liquified gasses for slow cooling prior to immersion in the coolant.

Remark:
1. Not suggest use beaker for accurate measuring.
2. There should be no water droplets on the outer wall of the beaker when heated, Otherwise it will cause uneven heating.
3. When heating the liquid in the beaker, do not exceed 2/3 of the volume of the beaker, generally 1/2 of the volume of the beaker is appropriate.
4. During the dissolution or dilution process, when stirring with a glass rod, do not touch the bottom or wall of the beaker.
5. When heating corrosive drugs, a watch glass can be covered on the mouth of the beaker to prevent the liquid from splashing.
6. The beaker is a common laboratory glassware, usually made of glass, plastic or heat-resistant glass. The beaker is cylindrical, with a notch on the top side, which is convenient for pouring liquid.