Conical Flask 2000ml pack of 2Pcs Borosilicate Glassware

Conical Flask 2000 ml pack of 2Pcs Borosilicate Glassware Conical Flask 2000ml features a heavy duty rim for longer lab service and approximate graduations in durable white enamel. It also has an extra large marking area. The Erlenmeyer Flask is used to heat and store liquids. The advantage to the Erlenmeyer Flask is that the bottom is wider than the top so it will heat quicker because of the greater surface area exposed to the heat. Specifications... Capacity: Conical Flask 2000ml Material: Borosilicate glass code 7740 Flask Style: Erlenmeyer Neck Style: Narrow Mouth Top Style: Heavy Duty Rim Rubber Stopper No.: 10 Height: 268mm Outer Dimension: 160mm Graduation Range: 600 - 1800mL Graduation Interval: 200mL Autoclavable: Yes Upper Extreme Temp: 490°C (914°F) Upper Working Temp: 230°C (446°F) Lower Working Temp: -230°C (-382°F) Max. Thermal Shock: 160°C (320°F) These Erlenmeyer flasks help the best brewers to make large yeast starters to get their beer fermenting fast. Large populations of active yeast help ensure a healthy fermentation, free of off flavors.  One of our favorite things about the Erlenmeyer flasks is that you can boil your starters directly in them!Our large 2000ml Erlenmyer Flask is the ideal vessel to make a large yeast starter for 5 gallon lagers and high gravity brews. Because it is made from borosilicate glass you can move it from a boil on your gas stove into a cold water bath for cooling, without the risk of cracking. (We do not recommend the use of an electric element. If this cannot be avoided, we recommend using a larger pot as a hot water bath on the stove.) This means you can do the whole process in one container, keeping it simple and helping to reduce the risk of contamination when transferring from one container to another.Recommended Process for Use of Flask:Double Boiler MethodIt is important for your safety to heat water in the flask with a heat source that distributes heat evenly. Our manufacturer has confirmed that direct heat to the glass can break down its integrity and break if the heat source doesn't distribute evenly.Morebeer! recommends using the "double boiler method."  This process involves using a boiling water bath on the outside of the flask to heat up the water inside the flask.  All you need is a  3 gallons or larger.  This process is much safer and efficient. If the flask should break or boil over, your kettle will be there to collect the contents, thus keeping your stove clean and keeping you away from potential harm.  Features Massive 2L (2000mL) Capacity Made from Borosilicate Glass Fantastic price for a flask of this size Produced for MoreBeer! 6.5" base 2.5" top 10.75"H  Safety Tips: Always replace glass laboratory containers that have become scratched or abraded. These defects will make the glass prone to breakage while in use. The maximum working temperature for Borosilicate glassware is 490°C. However, once the temperature exceeds 150°C, ensure that heating and cooling is achieved in a slow and uniform manner. Do not use hydrofluoric or hot phosphoric acid in glass. Hot alkalis will etch glass.