Product name: double layer rainproof sand proof adjusting shutter
Double layer rain-proof and sand-proof regulation shutters are suitable for factories or public buildings with long-term ventilation requirements, and where air flow is required to be controlled. It has rainproof 100 blades, regulating blades, stainless steel mesh and outer frame composition. It has the function of preventing rain, preventing sand and regulating flow rate. It has the function of single layer rainproof shutter and adjusting shutter at the same time.