DescriptionThese versatile transparent glass tubes can be used in many applications, from laboratory analysis to food and beverage services, so you cannot miss this set! Silicone stoppers are better quality than rubber stoppers and do not smell pungent, re-usable grade glassware. Made by borosilicate glass, Silicone plug.Feature- Color: As Shown. - Material: Glass. - Size: 15.5 x 2 x 1.5cm. - Come with 8pcs graduated glass test tube with screw cap, 4 capacity, 2pcs Per Capacity. - 4 capacity: 10ml, 15ml, 20ml, 30ml. - Made of heat-resistant glass, is made of hard plastic, more longer service life. - Great for storage of candy, sample, measuring liquid etc.