In borosilicate 3.3 glass, class A+, PE stopper.

• Very good chemical resistance
• Graduation markings engraved to 0,4 mm maximum thickness to ensure accuracy
• Identification and traceability by batch

Class A+ ASPIN glassware provides unparalleled accuracy. The body of the flask is solid and of uniform thickness, the base is wide, flat and very stable. The tolerances with guaranteed maximum error are more stringent than those for the AFNOR standard B 35.307, class A. Inspected on two occasions by different operators.