UNIVERSAL SIZE: Compatible with most dual flush toilets. Diameter:38mm/1.5inch. toilet flush button is compatible with holes with a diameter of 38mm-43mm. Please check the size of your toilet lid hole before ordering.REFUSE TO GET STUCK: toilet flush button uses 304 stainless steel spring, which is not weak after 100,000 press tests. The button part is made of engineering ABS plastic, which is strong and durable. Won't leak, won't get stuckEASY TO INSTALL: flush toilet button is very easy to install. Just screw it up by hand. No need to use any other tools. Save your time and energy.BEAUTIFUL APPEARANCE: toilet push button flush surface chrome plating process, which is very textured and can prevent damage by corrosion100% GUARANTEEAll products come with 12 months warranty,if you are not satisfied with our product you will receive a full refund and no questions asked.