Test tube caps, Labocap, silver, 12/13 mm.

These caps for test tubes are used in microbiological, biotechnological and bacteriological laboratories. They are mainly used for protection against falling dirt into it and guarantee the required sterilizable, but not hermetic seal. The built-in springs made of chromium steel make the caps cling firmly on the tubes and ensure the required airflow.
 
made of high grade aluminium
with coloured anodized coating
washable with neutral cleansing material (max. 140 °C)
sterilizable
reusable
stainless
heat-resistant
high durability
without handle