VWR® Anti-Evaporation Spheres for Water, pk of 100 Baths

Lightweight, economic PP spheres which form a blanket on the liquid surface. Spheres have 20 mm Ø, 275 spheres cover approximately 1000 cm².
 
Reduce heat loss by 77%, and evaporation by 87%
Insulate like a solid, and still allow instant access to the liquid in the bath