About this product:2 flush buttons, with dual flush and water saving function, in line with most peoples water consumption habits. It is compatible most dual flush toilets with 38mm-50mm hole in the tank cover. The double push toilet button is made of brand new ABS material, with stainless steel springs. The galvanized surface is chrome plated, with an elegant appearance and not easy to age, with strong corrosion resistance. Equipped with two 11. 4 cm long screw rods, which can be cut as needed to fit toilets of different heights. Product 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 ceramic round holes at 50 mm. Type: Toilet push button. Material: ABS plastic. Feature: Eco-Friendly. External diameter of the button: 50 mm. Thread diameter: about 38mm. Screw Rods Length: Approx. 114mm. Package including:2 x Toilet Water Tank Push Button. Warm Tips:Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.