Agilent Varian’s aluminum block valves are the valves of choice for medium- and high-vacuum requirements. These low-cost, compact, and reliable valves are used for applications in semiconductor manufacturing, R&D, and industrial vacuum systems. Agilent Varian block valves will reliably achieve 300,000 cycles or more in most applications. This block valve has KF16 inlet outlet size flanges and has a hand operated knob. Varian Part Number X3202-60031.