PROTECTIVE PACKAGING: Each test tube is being wrapped with individual bubble bag in box to prevent the glass test tube from being damaged during transportation.
SIZE: 25x140mm(45ml), The wall thickness of the glass is 1.1mm, The inner diameter of the opening is 22mm and outside diameter is 25mm.
TIGHTNESS: Every glass test tube with a cork stopper and keep tube sealed.
MATERIAL: These test tubes are made of borosilicate glass, can be heated and the heat resistant temperature should be under 392(℉) or 200(℃).
APPLICATION: Perfect for bath salts, hot chocolate, candy gumball storage, plants propagation, scientific experiments.