All the boxes inside the electric eauipments require breathing instruments by reason that the changing temperature and excessively wet circumstance will easily bring the accumulation blocking the drain. This kind of breathing instruments could be assembled base on consumers' demand, it can only be fixed on the bottom of the eauipments.

Material: Body: Brass or 316L stainless steel.
Filter: Nickel chrome alloy/polythene
Gasket: NB rubber O ring
Box furnishment: Fixed on waterproof wall, M20 nut match with fixing hole, 4xM4
Ingress protection: IP66