... (0.5mm), SS201(0.34mm) 3. errosion resistance Stainless Steel Vent Cap for HVAC systems 1. Apply for ventilationWith mesh proof inserts ... Use for exteral walls as a vent hoop 2. Size 100mm,150mm,200mm,250mm,300mm 3. Stainless ... mesh two types We main products are spiro air duct, vent duct, ship duct, elbow, connector, flanger, reducer, damper, tee, and ...