Features: *ABS plastic have a good hardness and it is extremely lightweight. *It also have a good resistance of acid and alkali. *A design with thinner top and thicker bottom can make this vent much convenient to connect. *Internal arc design reduces wind resistance. *Widely used on bathroom or kitchen extractor fan, In-line extract fans or cooker hood Specifications: *Material: ABS Plastic *Color：Black *Size：100#,110#,120#,150#,160#,200#,250#,300# Package Content: 1 x Duct Connector Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Tired of Cheap Quality? Say no! Made of high quality material, durable and practical to use. Please check the size, type and shape of the product picture before buying to ensure that the product is suitable for you. Every customer can enjoy 30 days refund for Damaged/Quality Issues. If you have any questions,please feel free to contact us,we will solve it for you immediately. GDHOME Duct Connector Square Flange ABS Plastic for 100-300mm Dia Hose Check Valve.