Just take out the old bouncing core and install anew wash basin plugs.Note that it cannot be used with a drain hole having cross in it. Kindly double check if you have a drain hole like that. For bathtub ，Bathroom Sink,etc.
eBay
Easy to insert into the wash basin. Practical wash basin plug. Specification: Colour: Black Size: 4.0cm Package Contents: 1 x Wash Basin Plug Wash Basin Plug Universal Sink Bathroom 40mm Pop-Up Plug Replacement Note: 1.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!
eBay
Screw Thread: M8.
eBay
The tight, leak-proof design supports efficient water drainage while preventing clogs.
eBay
Build in Strainer: Unlike regular puch button drain,this drain stopper has a anti-clogging basket strainer inside that neatly collecting hairs and prevents the drain from clogging. No jewelry, rings, dirt and other things will enter the drain pipe.
eBay
Washbasin Leak Plug, Stainless Steel Odor Proof Bouncing Core, Press Type Sink Drain, Universal Accessory for Washbasin. Crafted from high-quality 304 stainless steel + ABS, this washbasin leak plug ensures durability and longevity, resisting corrosion for a lasting solution.
eBay
Easy to insert into the wash basin. Practical wash basin plug. Specification: Colour: Black Size: 4.0cm Package Contents: 1 x Wash Basin Plug Wash Basin Plug Universal Sink Bathroom 40mm Pop-Up Plug Replacement Note: 1.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!
eBay
Material: copper. Size: as shown in pictures.
eBay