A. This product is small and does not take up space, and compared with the traditional process, it can effectively increase the water output, which is more than that of the traditional float valve. It can replace the traditional floating ball valve with stable performance and high reliability. B. This water level control float valve is made of food grade 304 stainless steel, which helps ensure the safety of drinking water. It has an exquisite appearance and a durable hard shell, with strong friction and impact resistance, which helps extend the service life of the product and reduce issues caused by friction in daily use. C. It is constructed of stainless steel material. When the water level in the water tower drops, the floating ball falls, and the pressure of the water in the water pipe is used to open the plunger with the sealing silicone surface in the valve body, so the valve body starts the water supply; when the water level in the water tower rises, the floating ball floats up, and the connecting rod drives the plunger. D. There are 4 types for your choice: A, B, C and D. The floating ball valve is suitable for water tanks, water towers, pools, solar water tanks, water storage, etc. No electricity is needed, and clean water with a pressure greater than 0.2 kg is used to control the water level. The item name is Float Valve, and the material is Stainless Steel. Its features include Fully Automatic, Food Grade Material, and Hard Shell. Size Details: A, L: 9cm/3.54", W: 4.8cm/1.89" (Approx.), Caliber: 2cm/0.79" (Approx.); B, L: 10.8cm/4.25", W: 4.8cm/1.89" (Approx.), Caliber: 2cm/0.79" (Approx.); C, L: 9.6cm/3.78", W: 4.8cm/1.89" (Approx.), Caliber: 2.5cm/0.98" (Approx.); D, L: 11cm/4.33", W: 4.8cm/1.89" (Approx.), Caliber: 2.5cm/0.98" (Approx.). Notes: 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. Package Includes: 1 x Automatic Float Valve, 1 x PTFE TAPE.