Volumetric Flask – Borosilicate, Poly Stopper, B Grade, 25 x .03ml – High quality Volumetric Flasks at an affordable price, made in Europe from borosilicate for extreme durability in your laboratory. Designed to withstand high temperatures and the harshest chemicals. Leading European manufacturer, with over 175 years of experience manufacturing borosilicate glass. Borosilicate for the harshest lab environments. Dishwasher safe and chemical graduations.