Manufacturer Name: Belimo Product Number: B211 OEM Part Number: B211 Product Description: Connector Butt 22-18W Pk Of 18 Weight:0.51lbs/231.33g The Belimo B211 is a 2-way control valve designed for precise regulation of fluid flow in HVAC systems. It features a compact, nickel-plated brass body measuring 1/2 inch in diameter, making it suitable for tight spaces. https://www.partshnc.com/12-2wayvlv-19cv-ss-trim-3