... (0.5mm), SS201(0.34mm) 3. errosion resistance Stainless Steel Vent Cap for HVAC systems 1. Apply for ventilationWith mesh ... hoop 2. Size 100mm,150mm,200mm,250mm,300mm 3. Stainless steel material. (SS304) or (SS201) 4. Low price and high quality ... , vent duct, ship duct, elbow, connector, flanger, reducer, damper, tee, and many other ventilation accessories. Stainless Steel Vent Cap for HVAC systems