Reagent bottles made of high quality, amber colored Borosilicate 3.3 glass. Features white graduation lines. As per DIN ISO 4796-1 standard. Equipped with an orange, GL 45 screw cap and features a drip free pouring ring for cleaner, safer transfers of liquids and powders. Both screw cap and pouring ring are autoclavable. Bottle features superior chemical durability and low temperature gradient, can withstand high temperatures & thermal shocks.