BUILT-IN FILTERS: Sink drain valve, There is a valve at the bottom that can automatically close against insects and odors. The sink stopper has an inner basket strainer that can collect hair and prevent the drain from clogging, objects can't enter the drain, such as jewelry, rings, dirt, etc. UNIVERSAL SIZE: Bathroom sink stopper It is suitable for drain holes with an inner diameter of 34mm-40mm. Please pay attention to the installation size of your sinks before purchasing, to avoid the product entering the drain hole. PREMIUM MATERIAL: Sink stopper made of high quality solid brass and PC material. Chrome surface effectively protects against corrosion and rust, good rebound and rebound resistance, sealing and fast draining can be achieved with one click. WIDE USE: The drain stopper can be used in the bathroom for sinks and bathtubs, as well as for the kitchen. EASY INSTALLATION - No tools needed, can be easily installed with bare hands. All components can be easily removed. Due to the simple and practical structure, even for women, the drain can be installed in a few steps completely without using the commercial sink instructions.