This single flat-bottom test tube has a 5mL capacity and is made from borosilicate 3.3 glass. It is fitted with a Bakelite screw cap to ensure a tight seal for secure storage and transport of chemicals and samples. The tube measures 0.6 inches wide and 2.1 inches tall including the cap. The borosilicate glass is autoclavable with superior chemical durability and can withstand high temperatures and thermal shocks. Suitable for transferring and storing chemicals, handling biological material, and general laboratory applications.