These popular caps fit plain end culture tubes and flasks with DeLong style necks or ports. The caps are molded from durable, autoclavable polypropylene (PP). They are available in a full range of five sizes and five colors for easy sample identification and organization. Recommended tube diameter is indicated on each cap.
- Polypropylene (PP)
- Ridges inside cap provide secure grip and gas exchange
- Available in five sizes and five colors
- Maintain sterility without cotton plugging
- Reduce sample evaporation compared to cotton plugging
- Provide same evaporation and sterility benefits as stainless steel closures