Product Name: PVC Reducing Elbow Connector ​Color: Gray, White, BlueSize: 25-20mm, 32-20mm, 32-25mm Connection Mode: Use PVC Glue To ConnectMaterial: PVC (Environmental protection material, safe and non-toxic)Use Installation Instructions:The joint connect with PVC pipe. After applying PVC glue to the joints and pipes, insert it in 1 minutes. After 15 minutes, the glue solidified initially and had a certain intensity after 2 hours. 24 hours later, the effect will be better.Note: Manual measurement, there are some small errors, please understand. Thanks