Material: ABS+copper,Size: As picture show Bounce core for sink drain pipe, plug-in bounce head for sink drain.Selected materials, refuse to rust and blacken, all-copper bounce core, thick copper material, strong and durable,The bounce is not stuck, the pressing is more sensitive, and the spring is airtight built in.Easy to install, plug and play,suitable for more than 99% of the drains. Notes: 1. Please allowed 1-3mm differences due to manual measurement, thank you for your understanding! 2. Due to the difference between different monitors, please understand that the picture may not reflect the actual color of the item.