1111 Boiling Flask, Flat Bottom, Boro 3.3 Glass Description: Boiling flask is globe shape but flat bottom, used for boiling operations, these flasks are made of heat resistant borosilicate glass and may be exposed to flame. The flasks are not graduated. They are often used with condenser, seperatory funnel and so on. The flasks also make unique decorative storage containers. Often used in laboratory .Used for heating, boiling, purify and distilling. There are 18 sizes available, 25ml Flat bottom Boiling flask, 50ml, 100ml Flat bottom Boiling flask, 125ml Flat bottom Boiling flask, 250ml Flat bottom Boiling flask, 300ml Flat bottom Boiling flask, 500ml Flat bottom Boiling flask, 1000ml Flat bottom Boiling flask, 2000ml Flat bottom Boiling flask, 3000ml Flat bottom Boiling flask, 4000ml Flat bottom Boiling flask, 5000ml Flat bottom Boiling flask, 6000ml Flat bottom Boiling flask, 10000ml Flat bottom Boiling flask,15000ml Flat bottom Boiling flask, 20000ml Flat bottom Boiling flask,50000ml Flat bottom Boiling flask. Material: Boro 3.3 Glass Color: Clear Glass Selling points: heat resistant borosilicate glass storage containers. 1115 Boiling Flask, Round bottom, Boro 3.3 Glass Description: Narrow neck round bottom boiling flask is Made of special Borosilicate glass (Bore 3.3) that has excellent chemical and physical properties. Stable structure with great mechanical strength and high resistance against chemical attacks; Withstands high thermal shock.Used in chemical industry, petrochemical industry, biochemical pharmaceuticals, laboratory and education. There are 18 sizes available, 25ml Round bottom Boiling flask, 50ml, 100ml Round bottom Boiling flask, 125ml Round bottom Boiling flask, 250ml Round bottom Boiling flask, 300ml Round bottom Boiling flask, 500ml Round bottom Boiling flask, 1000ml Round bottom Boiling flask, 2000ml Round bottom Boiling flask, 3000ml Round bottom Boiling flask, 4000ml Round bottom Boiling flask, 5000ml Round bottom Boiling flask, 6000ml Round bottom Boiling flask, 10000ml Round bottom Boiling flask,15000ml Round bottom Boiling flask, 20000ml Round bottom Boiling flask,50000ml Round bottom Boiling flask. Material: Boro 3.3 Glass Color: Clear Glass Selling points: High transparency