SANEI (Sanei Water Faucet Manufacturing Co., Ltd.) Rubber Stopper with Chain for Bathtub "PH29-40" Application: This rubber stopper is installed in the drain of a bathtub and stops water by sealing against the inner diameter of the bathtub drain fitting. Size: For drain diameter of 40mm. Accessories: Includes a 3.2mm or 4mm ball chain (length 670mm). Materials: Made of stainless steel, brass, and EPDM. Important Notes: Be sure to push the rubber stopper firmly into the drain. Dry running due to water leakage may cause a fire. Thank you for viewing. I am selling this due to my mother closing her shop. Thank you for your purchase.