Unpowered automatic ventilator product attributes
Material: the axis of the use of SUS304# production, nickel rivets, double rivet, the base 304#0.5mm stainless steel sets, imported fully sealed bearing
Origin: Chuzhou Anhui
Brand: dasiron/ Dragon
Use: industrial plant ventilation, warehouse, villa, keep indoor air circulation, free power, maintenance free, no noise, aging resistance, waterproof.
Service life: 30 years
Specifications：