Agilent Varianís stainless steel metal bonnet sealed tube 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. Varianís valves will reliably achieve 300,000 cycles or more in most applications. This tube valve is offset and has CF 2.75 inlet outlet size flanges and has a hand operated knob. The large inner diameter of the 1-1/2 inch tube allows for high through put and pumping speed.