Standard drain opening: Fits standard US bathroom sink with 1.65-1.97 inch drain hole.please check the size of the sink hole before purchasing. Easy operation: Press the cover to seal and press again to open. You can turn the upper cap counter-clockwise to unscrew and remove. Easy to install: All required gaskets, seals and mounting nut are included. Please make sure the gaskets are in the right position (please refer to product pictures or instructions) to avoid leakage. Dimensions: Overall length from the top of pop up cap to the end of tailpiece: 8.82". Diameter at Top: 2.2". Diameter at tailpiece connection: 1.24". ABS&PP body drain fit sink with overflow and sink without overflow Please contact us if you have any problems or suggestions visa Amazon,you will get reply in 24 hours.