详细描述：
These precision molded test tubes are manufactured from premium grade polypropylene or polystyrene. Low density polyethylene caps are available separately in a variety of colors

Multi-purpose test tubes All tubes are plastic (polystyrene or polypropylene) thus preventing the problem of broken glass Polypropylene is chemically resistant, autoclavable and virtually unbreakable Polystyrene offers the most glass-like clarity Caps for all test tubes are ordered separately and are not available sterile