【Installation Dimensions】: Pop-up drain cover diameter: 7cm, height (pop-up opening): 10cm, height (pop-up opening closed): 9cm, external thread diameter: 4.3cm, compatible with 3.8cm waste pipes, compatible with NPSM bathtub drains, suitable for most freestanding bathtubs. 【Durable Material】: The pop-up mechanism is made of heavy-duty brass with a 304 stainless steel spring for a long service life. The body is made of heavy-duty brass, resistant to deformation. 【Easy to Use】: Our freestanding bathtub drain has a pop-up design and can be operated manually without bending over. Simply press with your toes to control bathtub drainage and water retention. 【Leak-proof Design】: This freestanding bathtub drain has a leak-proof design and is sealed with a high-quality double-layer rubber gasket. Just tighten the nut; no glue is needed, but the seal is more airtight. Two drain holes make drainage easier. 【Product Includes】: Our freestanding bathtub drain kit includes a stopper cover, a drain