【Durable and Reliable Construction】Made from premium PVC material, this downspout adapter offers outstanding durability and strength to withstand heavy usage and harsh weather conditions. Its corrosion-resistant properties ensure long-lasting performance, making it an ideal solution for maintaining your drainage system 【Dual-End Versatility】Designed with a rectangular end measuring approximately 10.6 x 8.1 cm (4.17 x 3.19 inches) and a circular end with an inner diameter of 9.8 cm (3.86 inches) and outer diameter of 12.4 cm (4.88 inches), this adapter is compatible with standard 3-inch and 4-inch drain pipes, providing flexibility for various setups 【Improved Water Flow Efficiency】Enhance your drainage system by seamlessly connecting downspouts to underground pipes. This adapter effectively diverts rainwater away from your home’s foundation, preventing water damage and ensuring a well-managed rainwater runoff system 【Easy and Secure Installation】The adapter is designed for quick and straightforward installation using screws to secure it firmly in place. The additional screws ensure it remains stable even during heavy rain, eliminating concerns of displacement or water leakage 【Essential for Home Drainage Systems】Perfect for homes with gutter systems, this downspout adapter is a must-have for anyone looking to improve water drainage. Whether you're preventing basement flooding or maintaining landscape health, this adapter is the efficient and reliable solution you need Specifications: Material: PVC Size: Rectangular end: about 10.6x8.1cm/4.17x3.19 inches Round end: inner diameter about 9.8cm/3.86 inches, outer diameter about 12.4cm/4.88 inches