A ball valve is a form of quarter-turn valve that uses a hollow, perforated, pivoting ball to control the flow through it. It is opened when the hole in the ball is in line with the flow and closed when rotated 90 degrees by the valve handle. The handle lies flat in alignment with the flow when open and is perpendicular to it when closed, allowing visual confirmation easy to check the status of the valve. Features: Valve bodies are made of 304 stainless steel for rust protection and long life. Ball valves are durable, performing well after many cycles, and reliable, closing securely even after long periods of inactivity. The ball valve's ease of use, repair and versatility give it wide industrial use. The handle lies flat in alignment with flow when open and perpendicular when closed for easy visual confirmation of valve status. These high quality ball valves would be excellent choices for shutoff and control applications. Specifications: Material: 304 Stainless Steel Port Type: Reduced Port Thread Type: Female x Female Thread Standard: BSP (British Standard Pipe) Thread Size: 1/4", 3/8", 3/4", 1 ", 1-1/4", 1-1/2" (optional) Thread Size (BSP) 1/4" 3/8" 3/4" 1" 1-1/4" 1-1/2" Thread Inner Diameter (Approx.) 11.4mm 14.9mm 24.1mm 30.2mm 38.9mm 44.8mm Max. Pressure: 1000PSI Quantity: 1 Package Includes: 1 x Ball Valve Note : This one-piece product is half-diameter and small flow design.