Features: Upgrade your microwave ventilation systems effortlessly with this 4 inch galvanized steel duct change set , featuring a secure rectangular to round design, included safety gloves, and adhesive tape for leak proof installation. Crafted from strong galvanized stainless steel, this compact 3 1/4"x10" to 4" circular duct adapter ensures rust resistant performances, space efficiency, and seamless compatibility with exhaust fans or dryer vent covers. Ideal for homeowners, enthusiasts, and contractors seeking to optimize airflows in kitchens, laundry rooms, or spaces requiring stable ventilation systems upgrades. Perfect for retrofitting existing ducts in residential or commercial settings, this change set maintains air circulation integrity while resisting weather exposure in outdoor or high humidity environments. Engineered with accuracy folded edges and reinforced seams, this ventilation essential secure long term durability, minimizing maintenance needs even under continuous sun or rain exposure. Specifications: Component : steel Size: about 290x185mm/11.4x7.3inch Package Includes: 1 set Ventilation systems note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.