Set of 10 hermetic caps for test tubes

Description

Must be pierced with a (cold) needle to allow ants to breathe!

Never use as is in a completely hermetic way with ants inside.

This stopper makes it possible to strongly increase the rate of hygrometry inside the tube. Evaporation is greatly reduced and the water reserve lasts much longer.

Easy to drill at 9mm to add a pipe and connect the tube to a hunting area or anthill.

Not recommended with Messor which must store the seeds in a dry place (except with a harvesting area).
Color: usually translucent

Lot of 50 or 100 on request at a reduced price.