SIZE & PACKAGE: The outside and inside diameter of this sink strainer are 7.5 cm and 4.5 cm. Set of 8 pieces to meet the filtration needs of most household sinks. MATERIAL: The shower hair catcher is made of stainless steel, rust-resistant, durable, and not easily deformed. Smoothly polished with a smooth surface and edge, it can support weight without concern during use. Heavy-duty construction enhances grip to prevent the drain cover from shifting with water flow. ANTI-CLOG DESIGN: The edge of the shower drain cover is flat and sits lower than the sink outlet. The drain strainer features 10 large holes (4 mm) and 64 small holes (3 mm). The dense drainage holes effectively catch small debris, food scraps, and hair while allowing water to pass through quickly. EASY TO USE & LOW MAINTENANCE: Place the sink strainer into the corresponding drain. After use, simply remove the debris and rinse the strainer under warm water or clean in the dishwasher to maintain its shine. A TIDY HOME FOR YOU: This hair trap helps prevent drain clogs and unpleasant odors, and deters bugs from coming up through the sink. It can also be used as a tea strainer or for rinsing rice and beans.