Description
- Fit plain end culture tubes and flasks with DeLong style necks or ports
- Molded from durable, autoclavable polypropylene (PP)
- Ridges inside cap provide secure grip and gas exchange
- Available in five (5) colors for easy sample identification and organization
- Maintain sterility without cotton plugging
- Reduce sample evaporation compared to cotton plugging
- Provide same evaporation and sterility benefits as stainless steel closures