Description: 1. Material: brass, steel 2. Inner Diameter of Drainage Hole: 34mm-40mm 3.Product weight: 36g Characteristics: 1. up drain filter design undermines traditional and inconvenient drainage methods (such as basic plug with chain)! You can switch between the two modes, plug (water storage) and filter (water drainage), just by lightly pressing the top cover. 2. Built-in Strainer: Unlike regular puch button drain, this drain stopper has an anti-clogging basket strainer inside that neatly collect hair and prevents the drain from clogging. No jewelry, rings, dirt and other things will enter the drain pipe. 3. Water-proof: It is a thickened, barbed and silicone gasket, which does not require glue, and it is characterized by oxidation resistance. 4. Sturdy Sink Stopper: It is an integrated seamless design. The rubber ring around this built-in basket keeps the stability, it won't tip over when you press the button. So you don't have to worry about sealing and drainage. 5. Tough Material: The up sink drain pipe is made of thickened and steel material, which is characterized by explosion-proof and crack-proof, durable, smooth and comfortable to the touch, rust-proof, corrosion-proof and discoloration-proof . 6. Easy to Install: Anyone can install the up drain fliter because it has a simple structure and no tools. Just take the old sink drain stopper and insert the bouncing core. Package Includes: 1 * Bathroom Sink Drain Stopper Remark: 1. Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. 2. The measurement allowed error is +/- 1-3cm.