These colourful caps are moulded with a deep internal lip that fits snugly against the interior wall of the tube. This prevents the contents from coming into contact with the seal or threads, reducing the chance of sample contamination.
Made from polypropylene, the same material as the tubes, means both the caps and tubes will expand and contract at the same rate in response to temperature changes(e.g.. during freezing or thawing)thus minimising the possibility of leakage.
In addition together they are tested to be 95kPa compliant making them suitable for specimen transport to UN3373 regulations when combined with appropriate secondary(e.g.. Specisafe SH0100SS, SH0300SS and SH1300SS)and tertiary packaging(e.g.. SH1000 or SH1200).
The top of the cap is flat and can be written on for easy identification of samples, and the range of colours further enables colour coding for at a glance identification of sample types.
The caps are compatible with tubes from the APEX plus and APEX white label ranges.
The caps are manufactured in a clean environment and are certified RNase, DNase, DNA and pyrogen free.