General description This Pop Up Sink Stopper with Anti-Clog Filter is a universal stainless steel product designed for various types of sink drains. It features a spring core and is suitable for drain holes with an inner diameter of 34 to 38 mm, making it a versatile choice for bathtubs, bathrooms, and kitchen sinks. Technical specifications Material: High-quality thickened copper Inner diameter of sink strainer: 33 mm Compatible drain hole diameter: 34 to 38 mm Installation No tools required for installation Can be easily installed by hand Simply remove the old spring core and replace it with the new one Includes a rubber ring to accommodate larger diameters Usage Features a built-in anti-blocking basket to collect hair and prevent clogs 2-in-1 design allows for switching between water retention and drainage modes To switch modes, gently press the top stopper down