The Belimo B210+TR24-SR-T US Characterized Control Valve is a high-quality HVAC and refrigeration part designed for precise control of heating and cooling systems. With a Cv of 0.5, this valve is ideal for maintaining optimal temperature levels in a variety of applications. The compact size, with an item height and diameter of 2 inches, makes it easy to install and operate in HVAC systems. The model B208+TR24-SR-T US from Belimo ensures reliability and efficiency in controlling the flow of heating and cooling gases."Multiple for sale posted on my page/account. So if needing more then 1 item we usually have dozens of each just click more for sale from poster, willing to cut deals for buying more then one"