Pyrex® heavy wall rimless test tubes are designed and constructed for optimum performance. Manufactured from high quality thermally & chemically resistant Pyrex® borosilicate glass. The heavy walls provide extra mechanical strength improved user safety and reduced replacement costs due to their robust construction. Capable of withstanding temperatures up to 500°C.Tube Dimensions: 24mm x 150mmWall Thickness: 1.8mmPack of 100