Features: Make of Brass, strong and corrosions resistant, great for heating systems. compression fittings have fixed stops that making connection firmly and safe, simplify the installation process and avoid the risk of pipe deformation. Suitable for most pipe types, including coppers, mild steel and carbon steels pipe. Can be quickly assembled or disassembled to facilitate maintenance work. Suitable for radiators, manifolds and most heating valves to support cold and hot water, with operating temperatures from -5°C to 90°C. Specifications: Material: Brass Height: 2cm/0.79inch Working Temperature: -5~90℃ Package Includes: 2Pcs/set Compression Fitting note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.