EBayStill troubled by these problems? Leaky bathtub drain plugs wake you up in the middle of the night with a foul odor; plugs you bought are the wrong size, either won't install or are loose; Old plugs malfunction, causing slow water flow and blockages, severely impacting your bathing experience! This universal pop-up bathtub drain plug set is designed to solve all these pain points, providing you with a -stop solution for greater peace of mind and comfort in your bathroom. The set includes 3/8-inch and 5/16-inch threaded studs and star-shaped locking washers, perfectly fitting most bathtub drains, so you'll never have to worry about the embarrassment of "buying the wrong size" again; The removable design is very thoughtful. After pulling out the plug, simply rinse with water to remove stains, prevent bacterial growth, and keep the drain clean and hygienic. Main Specifications: Material: Plastic + + Copper Product Color: Black Product Length: 2.23*1.97 Inches Package Includes: 1 Universal Pop-up Bathtub Drain Plug Complete ：The bathtub drain stopper set includes 1 bathtub drain plug, 1 3/8-inch threaded stud, 1 5/16-inch threaded stud, and 1 star-shaped locking washer. No additional are needed; it directly adapts to your bathtub needs. Sealed and Leak-Proof：The star-shaped washer reinforces the connection between the stud and the drain outlet. With the drain plug closed, the built-in washer fits tightly against the drain outlet to prevent leaks. With Most Bathtubs:The universal tub stopper comes with mainstream threaded stud sizes (3/8-inch and 5/16-inch). (Inches), covering the drain specifications of the vast majority of bathtubs in the market. Easy Installation:First, confirm the drain thread size, select the corresponding stud, and screw it clockwise into the bottom of the drain plug. Insert the assembled drain plug into the bathtub drain and press to secure it. High-Quality and Durable Materials: This pop up drain stopper built-in high-performance spring, not easily deformed or malfunctioning under repeated pressure. The outer shell is made of high-strength, high-quality plastic, pressure-resistant and drop-resistant, and the top cover has a waterproof coating.