Universal pop-up wash basin sink: Made of high quality copper with chrome finish, and the solid brass bouncing core has good rebound and rebound resistance, resistant to detergents and oils, can seal the hole from the sink and drain the water quickly. High quality:The seal ring is a high-quality silicone ring, which is not easy to age and has better sealing. Push the sink stopper to prevent waste from entering the pipe. Thoughtful design: Adopting spring mechanism and screw pusher, simply push the sink stopper sink to drain water quickly. The slotted bolt set is detachable, so it is convenient to clean. Exquisite Appearance: The sink cover adopts exquisite chrome appearance, which brings you a comfortable touch. The noble chrome cover plate shines with an extremely smooth surface in your washbasin sink! Hold Fitting:The spring-loaded drain plug is suitable for a sink with a hole of 36-39mm. Please ensure the hole size before purchasing. (If some parts are missing due to transportation, please contact us in time for refund or replacement. Specifications: Diameter: 6.6cm < p>Thread size: M8 Bolt thread up: M8, M16 Height: 3.7 cm Height closed: 2.8 cm Color: Silver + Gold Material: zinc alloy, brass Package included: 1 bolt +1 button Remarks : 1. Please allow 1-3mm differences due to manual measurement, thank you for your understanding! 2. Due to the difference between different monitors, please understand that the picture may not reflect the actual color of the item.