PVA Foam Stoppers (green)

PVA Foam Stoppers
 
Whilst nothing beats the old-school classic "Test tube" setup, these funky green PVA Foam Stoppers are a great twist to provide a greater humidity gradient within your tube.
 
We find these especially helpful in the founding stages of the following species:
 
Messor cephalotes
Messor arenarius 
Myrmecocystus spp.
Pogonomyrmex spp. 
 
Additionally, due to the material of these, mold tends to grow at a much slower rate than on cotton fibres.
 
In order to use effectively, allow to soak in warm water for 1-2 mins before using. 
 
Specifications
 
Colour: Green
Size: Fits all tubes with diameters of 15 & 16mm.