Micro-perforation: a hole with a diameter of 2 mm. Allows the water to pass through, while capturing a large amount of food and waste.The unique beveled edge offers a firm fit; Scope: Used for sink drain holes with a diameter greater than 45 mm and less than 55 mm; Developed treatment, no burrs will hurt you in the hands; The large kitchen sink filter is in durable stainless steel; Delivery quantity: 2pcs