Please kindly noted that this item is sold by jindouyunshanghai from Joybuy marketplace. Detailed description: Specification Product name: Sink Plug Material: Copper + Stainless Steel Size: 6.2 x 4.5 cm Suitable for drain holes with an inner diameter of 33 mm - 40 mm. Parts List: 2 x Sink Plug for Stanley Cup [Universal Sink Plug] This bathroom sink plug is suitable for all types of pop-up strainer basket drains. Suitable for drain holes with an internal diameter of 33mm - 40mm. Sink plug size: 6.2x4.5 cm. [Built-in Filter] This sink plug filter features a non-clogging filter that easily collects hair ornaments, rings, dirt, etc. and prevents drain clogging. [Pop-Up Function] Our Universal Sink Plugs are made from solid brass pop-up cores for excellent pop-up and rebound resistance. Seals and drains quickly with just one click. No more clogging and leaking. [Stainless Steel Material] Our sink plugs are made of high quality stainless steel and thickened copper material, sturdy, rust and crack resistant. Provide you with reliable service. [Easy Installation] No tools required, anyone can easily install it. You just need to take out the old pop-up core and install the new one. If you want to use it for a larger sink hole diameter, you can use our included rubber ring to increase the inner diameter of the sink plug.