The test tubes are made of heat resistant glass to make your scientific experiments interesting. The cork can effectively prevent items such as powdered candy from getting wet or oxidized, so that the test tube has a good seal. Features - Color: <span style="color:#000000"><span style="font-size:16px"><span style="background-color:#ffffff">Transparent.</span></span></span> - Material: Glass. - Size: <span style="color:#000000"><span style="font-size:16px"><span style="background-color:#ffffff">20.00X2.50X2.50cm/7.86X0.98X0.98inch.</span></span></span> <span style="color:#000000"><span style="font-size:16px"><span style="background-color:#ffffff">- The test tubes are made of heat resistant glass to make your scientific experiments interesting. </span></span></span> <span style="color:#000000"><span style="font-size:16px"><span style="background-color:#ffffff">- The cork can effectively prevent items such as powdered candy from getting wet or oxidized, so that the test tube has a good seal.</span></span></span> <span style="color:#000000"><span style="font-size:16px"><span style="background-color:#ffffff">- These versatile clear glass tubes can be used in many applications, from services to festive party decorations, can’t miss this set! </span></span></span> <span style="color:#000000"><span style="font-size:16px"><span style="background-color:#ffffff">- Suitable for storing items that need to be kept dry or some liquid. </span></span></span> <span style="color:#000000"><span style="font-size:16px"><span style="background-color:#ffffff">- Also can be used as test tube vase to grow plants and flowers.</span></span></span> Package list: 10 tube