Environmentally friendly materials: Made of brand new ABS material, which is non-toxic, harmless and durable. Suitable for installation in circular ceramic holes with a diameter of 48 mm to 55 mm. High precision electroplating: The overall button electroplating, bright and shiny surface, adapt to the humid environment of the bathroom, resist acid and alkali corrosion. Economical quality: Made of stainless steel springs, durable and non-sticky. Double buttons, half row water and full row water are optional, which can save water. Double-press toilet accessories: Equipped with two 10cm long screws, which can be cut as needed to fit toilets of different heights. Its flexible and convenient. It is a perfect high pressure pumping accessory. Easy to install: All parts are easy to install - dual flush water saving feature, compatible with most dual flush toilet systems. Modern design, suitable for various toilet tank knobs.