Disposable Culture Tubes, 16x100mm, 14ml Disposable culture tubes are manufactured from high quality 5.1 expansion borosilicate glass. Rimless design enables easy plugging using a stopper. Caps not included. Meet USP Type I and ASTM E438, Type I, Class B requirements. Tubes are packaged in shrinkwrapped boxes to keep them particle-free, and four boxes are included in each case.