LDR 501 4200 Rubber Basin Stopper With Chain - Fits 1-Inch -1-3/8-Inch Drain Openings LDR 501 4200 Rubber Basin Stopper With Chain - Fits 1-Inch -1-3/4-Inch Drain Openings. Basin stopper. Fits drain openings for 1-Inch to 1 -3/8-Inch. Rubber stopper. Includes chain. Easy do-it-yourself installation instructions. Basin stopper Fits drain openings for 1-Inch to 1 -3/8-Inch Rubber stopper Includes chain Easy do-it-yourself installation instructions