Package Content: This product includes two sets of duct reducer kits, which consist of two 4 to 6 inch duct adapter, four adjustable hose clamps, two large ones and two small ones. It can be used simultaneously for the renovation of two pipelines to meet daily needs. High-quality Materials: The 6 to 4 inch duct reducer is made of high-quality ABS plastic, which is sturdy, durable and corrosion-resistant. The hose clamp is made of stainless steel and is not easy to deform. Diameter Dimension: The duct reducter is scientifically designed. The inner diameter of the small port is 93 millimeters and the outer diameter is 98 millimeters. The outer diameter of the large port is 155 millimeters and the inner diameter is 150 millimeters. The overall height is 4.56 inches. Easy to Install: Each round pipe reducer is equipped with an adjustable hose clamp, covering both small (91-114mm) and large (141-165mm) sizes. Just insert the corresponding size pipes into both ends of the joint and then tighten them with the matching hose clamp to complete the installation. Widely Applied: It is applicable to the pipe diameter reduction connection in various scenarios such as kitchen range hoods, bathroom exhaust fans, washing machine exhaust, dryer ventilation, fresh air systems, greenhouses, and industrial ventilation equipment. Welcome to Hanezo Store! We are here to serve you with the utmost dedication. Product Name: 2 Set 6 to 4 inch Duct Reducer Adapter Specification: Size: 6 to 4 inch Color: White Weight: 450g Material: ABS Including: 2 pcs Duct Reducers, 4 pcs adjustable hose clamps . Feartures: The duct reducer is made of ABS engineering plastic, which is sturdy and not easy to deform. It is equipped with a matching adjustable stainless steel hose clamp, making installation simple. It is wide