4 in Round Roof Flashing Cap, Vent, All Weather imney Cap Roof Round Roof Vent, Perfectly Insulated Vent Cover (Size : 2

[Product name] Unpowered hood[Product material]201[Product Model] Type 110, Type 150/160/200/Type 250, Type 300[Product Usage] Exhaust, heat dissipation, rainproof, and backflow prevention.[Product Usage] PVC pipes, roof flues, greenhouses, breeding farms, color steel tile roofs, concrete houses

• Noiseless and rainproof: The roof ventilation turbine makes no noise when rotating. The encrypted blade gaps are small enough to prevent rainwater from entering the ventilation system.
• Rotating imney cap: Utilizes the heat convection of air caused by natural wind and the temperature difference between indoor and outdoor to drive the turbine to rotate and disarge the indoor air.
• Stainless steel: The roof turbine vent is made of thickened 201 stainless steel material, whi will not rust and is .
• We have many models and sizes of imney covers in our store, if you can't find the size you want in the list, please send me an email and I will help you figure it out.
• Easy to install: The turbine vent requires no assembly, you just take it out and install it where you need it. Includes all mounting accessories.