Sustainable construction: good quality stainless steel with rubber seal, thick, solid and durable, not easily deformed, offering a long life. Easy to use: the rubber seal and The ball bearing allow this sink strainer to be used as a drain plug; Just push the strainer down to plug the hole. Filter waste efficiently: Each sink plug has 20 holes, can effectively filter waste, but letting flow from the Water and keep your free loose sink. Wide range of use: These two drain filters can be installed in the old sinks, baths, basins, and the smooth surface allows you to clean easily and conveniently. Size: The outer diameter of the sink strainer is 83 mm / 3.3 inches, suitable for the diameter of the sink 83 - 86.3 mm, the diameter of the rubber seal is 52 mm / 2 inches, please check the dimensions before buying.