Features: * High-quality pp plastic material: Made of strong pp plastic, ensuring long-lasting performance. * Excellent strength and corrosion resistance: Built to withstand high pressure and resist corrosion, ensuring reliable and safe use. * Smooth exterior and low air resistance: The smooth exterior design minimizes air resistance, improving overall airflow efficiency. * Versatile pipe connection accessory: Designed for convenient connection between ventilation pipes, providing a secure and seamless fit. * for for wall-mounted ventilation ducts: Perfectly suited for installation on walls as ventilation ducts, providing efficient air inlet and outlet capabilities for indoor ventilation equipment. Specifications: *Product Name:Plastic square to round flange joint *Material:High-quality pp plastic *Size:75/100/125/150/200/250/300mm *Color:black Package Content: 1 x Flange 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.