Description: Wade of premium Borosilicate glass with minimal thermal expansion, giving relatively high resistance to temperature changes Designed with long neck, flat bottom for clarity, strength, and resistance to heat and chemicals High temperature resistant and chemical resistant, practical tool in your laboratory Widely used for education, chemistry, research, or life science applications Heavy duty glass uniform wall thickness distribution,durable and practical Specification: Material: Borosilicate Glass Volume: 50ml Overall Height: approx. 95mm / 3.7 Inch; Diameter of Main Body: approx. 49mm/ 1.9 Inch; Diameter of Neck: approx. 28mm/ 1.1 Inch; Volume: 100ml Overall Height: approx. 111mm / 4.37 Inch Diameter of Main Body: approx. 61mm/ 2.4 Inch; Diameter of Neck: approx. 29mm/ 1.14 Inch; Volume: 150ml Overall Height: approx. 145mm / 5.7 Inch Diameter of Main Body: approx. 80mm/ 3.15 Inch; Diameter of Neck: approx. 29mm/ 1.14 Inch; Volume: 250ml Overall Height: approx. 165mm / 6.5 Inch Diameter of Main Body: approx. 88mm/ 3.46 Inch; Diameter of Neck: approx. 29mm/ 1.14 Inch; Color: Clear as shown in display pictures Package Includes: 1 Piece Flat Bottom Flask Note: Customer satisfaction is our primary concern. If the product is somehow cracked or broken during shipping, please feel free to contact us. We will try our best to give you a satisfactory solution.