Standard Replacement:These sink strainers are compatible with most standard 3-1/2 inch kitchen sink drains in the USA. The sink drain strainers require a narrow rectangular center hole. For further details, please refer to our provided picture. Tip: Just be mindful of is ensuring the center shape of sink is rectangular and checking the size/diameter of the sink drain, and then you're all set. Strainer or Stopper:These Kitchen sink strainers can function as either a sink strainer or a sink stopper with a simple push or pull operation. To allow water to through, pull and twist the kitchen sink stopper, transforming it into a kitchen sink strainer that efficiently drains water. To utilize it as a sink drain stopper, align the knob with the hole and push it all the way in; it then as a kitchen drain stopper. Fast Drainage:The kitchen sink drain basket features appropriately sized holes to swift drainage while effectively capturing food waste, scraps, and other debris from entering the drain. When twisted 90 degrees,the drain catcher sits slightly higher, enabling water to pass through and filtering out food debris and particles to prevent clogging., Weight: 0.3968320716 pounds, Manufacturer: Kueohse