Features: Crafted from premium brass, this 0.5 inch check valves offer erosion resistance, high temperature durability, and leak proof performances for long lasting water flows control in plumbing systems. Featuring general G1/2" compatibility with standard pipes and hoses, its threaded design ensures easy installation while preventing backflow in pressurized liquid systems. Ideal for plumbers, homeowners, and garden enthusiasts maintaining irrigation setups, washing machines, or outdoor fountain installations requiring stable valves solution . Perfectly suited for indoor/outdoor use in pumps systems, water features, or appliance connection where temperature fluctuations demand robust brass valves performances. Each set includes two heavy duty not return valves engineered to maintain unidirectional liquid flows when horizontally installed, minimizing pressure loss and systems downtime. Specifications: Component : Brass Size: 0.5 inch Diameter: about 3cm/1.2inch Type: 2 for option Package Includes: 2pcs Check valves note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.