Class A measurement accuracy in a reusable ten-pack of borosilicate flasks:

• Ten Class A flasks per pack, reusable, so clean glassware is ready while others are washed and dried
• Borosilicate glass 3.3 with high resistance to thermal shock and excellent thermal stability
• Resists water, neutral and acid solutions, strong acids, chlorine, bromine, iodine and organic substances
• Sharp etched graduation on the narrow neck for a precise meniscus reading, calibrated to contain (TC) at 20°C
• Polyethylene stopper fits the ground glass neck joint to limit solvent evaporation in storage or mixing
• Suited to preparing accurate solution concentrations with reproducible results

A pack of ten reusable Class A flasks means volumetric work carries on while others are being washed and dried. Each is made from borosilicate glass 3.3 and calibrated for accurate solution preparation, which suits laboratories that need dependable concentrations and results they can repeat.

The glass copes with sudden temperature changes thanks to its high resistance to thermal shock and good thermal stability. It also stands up to water, neutral and acid solutions, strong acids, chlorine, bromine, iodine and organic substances, so one flask type covers a wide range of solutions.

A sharp, permanent graduation line is etched onto the narrow neck, keeping the meniscus easy to read, and each flask is calibrated to contain (TC) liquids at the standard laboratory reference temperature of 20°C. A polyethylene stopper fits the ground glass neck joint to limit solvent evaporation while contents are stored or mixed, and the stable base to height ratio keeps each flask steady on the bench.

Need a smaller pack, or batch-certified flasks? See our Class A volumetric flasks with batch certification, or browse the wider laboratory glassware range.