Features: Engineered with premium grade brass and a reinforced 6 inch vertical design, this heavy duty check delivers exceptionally corrosions resistance and leak proof performances for industrial grade fluid controls systems. Featuring internal/external thread connection and thickened wall, the withstands extreme pressure and high temperature environments while enabling tool less installation on standard piping networks. Ideal for professional plumbers, HVAC technicians, and DIYer enthusiasts managing water supply lines, chemical processing systems, or residential plumbing upgrades requiring reliabled backflow prevention. Perfectly integrates with commercial boilers, water distribution networks, industrial filtration units, and household irrigation setups to maintain unidirectional flows in liquid/gas applications. For ANSI standards, this multipurpose brass check combines durability with precise engineering, ensuring long service life across marine, agricultural, and construction environments. Specifications: Component:Copper Size: Approx.46x25x25mm/1.81x0.98x0.98inch Size: Approx.68x26x26mm/2.67x1.02x1.02inch Size: Approx.57x30x30mm/2.24x1.18x1.18inch Size: Approx.60x30x30mm/2.36x1.18x1.18inch Package Includes: 1pcs Brass Check note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.