It Works as an Adapter between Floor Drain and Drain Pipe,the shower drain base is durable enough for a long lasting working life. ABS connectors and rubber connectors are suitable for all 2-inches shower drains, while the diameter of inner which is 2.36 inches can be connected to a standard size of sewer tube. ABS connector comes with 1 O-shaped rubber ring to play a sealing role. The rubber joint comes with 3 O-ring is to prevent leakage. During the installation process, it is better to use the rubber joint if you do not need to adjust the height. The shower drain base is made of excellent material and can be installed in any indoor or outdoor areas Heavy and durable. No worry or regret to get it. Contact us if you have any questions about this products.