The Watco NuFit PresFlo bathtub stopper trim kit installs over existing strainer bodies requiring only the provided silicone adhesive. The NuFit extends down into the drain. Check existing drain specifications.PresFlo stopper configurationExisting drains do not need to be removedExtends into the drainRequires a minimum 1.49 in. I.D. openingFlange covers make of 2.875 in. overall diameter0.850 in. depth clearance neededSilicone adhesive includedChoice of professionalsLimited. This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov