Cover Ball with edge, 40 mm

Adopting PP as material, it was produced by foaming a contracting method, which divided into edge or without edge covering ball. When covering ball floats onto water, the overlapped edge will short Floating cover's void fraction so as to reduce heat loss and evaporation rate. It is only reducing acid-mist mostly and improve the pollution of CO2 in air, but also protect water's quality, purify environment and so on.