Borosilicate glass 3.3, amber. Conformed to DIN EN ISO 4797. NS necks are in compliance with DIN 12242 standards.

NS jointed Erlenmeyer flasks
Flasks Erlenmeyer, NS joint
NS jointed Erlenmeyer flasks
Flasks Erlenmeyer, NS joint
NS jointed Erlenmeyer flasks
Flasks Erlenmeyer, NS joint
NS jointed Erlenmeyer flasks
Flasks Erlenmeyer, NS joint
NS jointed Erlenmeyer flasks
Flasks Erlenmeyer, NS joint