- Bio Plus test tube stoppers are made of polyethylene for test tubes with outside diameters of 12 mm.
- Test tubes can be closed but not sealed so that samples are maintained aerobic for microbiological procedures.
- Test tube stoppers can be pushed tight and fully sealed for anaerobic use, storage, transfer and centrifuge applications.
- Made from Low-Density Polyethylene.
- Single-position tight fitting stopper to fit disposable test tubes.
- Stoppers available in the following colors: Red and purple.
