[Premium Brass Construction] Ensures durability and long-lasting performance. [Universal Compatibility] Fits G1/2-inch female thread to G1/2-inch male thread connections./Fits G1/2-inch male thread to G1/2-inch female thread connections. [Compact Design] With overall dimensions of 20.4x29.2mm, it's suitable for various applications. [Prevents Backflow Accidents] Regulates one-way water flow, preventing accidents caused by backflow. Ensure correct installation direction to avoid water blockage. [Wide Application Range] Suitable for water heaters, tanks, towers, toilets, garden hoses, RVs, as well as landscape sprinklers, swimming pools, water parks, aquariums, and more. Material Brass Thread Size As description shown Overall Size 20.4x.