Premium Stainless Steel Material: This durable sink stopper is an upgraded version developed based on customer feedback. The sink strainer is made of high-quality stainless steel – well-made, rust-resistant, and durable. Easy to Use: Our sink strainer stopper is easy to remove and install. It only takes 10 seconds. Just follow the instructions to first unscrew the central shaft and then assemble the accessories. You can refer to picture 6 for more details. Dual-Function Strainer and Stopper: This new sink stopper can be used as both a sink stopper and a strainer. Press the button to fill the sink as a stopper and lift it slightly to drain the water and collect all residues as a strainer. Size - 84 mm: Please refer to pictures 2 and 3 for more details. The outer diameter of the sink strainer is 84 mm. The rubber gasket has a diameter of 53 mm and a bearing diameter of 30 mm. It fits sink holes with a diameter of 84-85 mm. Note: Please measure the diameter of your sink hole before purchasing to avoid ordering the wrong size.