Features: Improve your existing ductwork with this quality Air Ventilation Duct Connector Flange. Made of durable ABS material, this connector efficiently link ventilation equipment. Suitable for both indoor and outdoor use, this connector is perfect for anyone in need of better air circulation or exhaust. Easily install this versatile Air Ventilation Hose Connector in various ventilation setups for a healthier and more comfortable environment. Upgrades your ventilation setup with this reliable Air Ventilation Duct Connector Flange. Suitable for 6x6cm/2.36x2.36in cooling fan; Specifications: Material:Plastic Color:Black Option Type:Round Duct Connector Flange with Net;Round2 Duct Connector Flange with Net;Square Duct Connector Flange; Round Duct Connector Flange: Square Base Size:Approx.6x6cm/2.36x2.36in,Height:Approx.5.5cm/2.17in,Round Duct Diameter:Approx.5.5cm/2.17in; Round2 Duct Connector Flange: Square Base Size:Approx.6x6cm/2.36x2.36in,Height:Approx.6cm/2.36in,Round Duct Diameter:Approx.3.8cm/1.5in; Square Duct Connector Flange: Square Base Size:Approx.6x6cm/2.36x2.36in,Height:Approx.5.5cm/2.17in,Round Duct Diameter:Approx.6cm/2.36in; Package Includes: 1xDuct Connector Flange note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.