<p>How to choose: Start by removing the old damaged toilet lid knob, measure the inside diameter of the toilet lid mounting hole, our flush knob is suitable for mounting in 38mm-50mm ceramic round holes . Type: Toilet push button Material: ABS plastic Feature: Eco-friendly. Outside diameter of the button: 50mm. Thread diameter: approx. 38 mm. Length of screw rods: approx. 114mm. Package includes: 2 x Toilet Water Tank Push Button. Warm Tips: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. If you have any questions about our products, please contact us in time, we will give you a satisfactory answer within 24 hours</p> <p>Note: The data is manual measurement, please Please allow 1-154cm error, due to differences between light and screen, there will be a certain color difference, the specific received in kind prevail.</p>