Features: Easy to install. Pressure rating 0-10 bar. Temperature rating 0-120C. Suitable for floor heating system. When installation, please do not use hand move header straight lines wire (pressure gauges movement, silk, table light, on the same line, by hand pull (header rotation, due to the uneven can cause pressure gauges structure deformation, damage effect use effect and internal structure or old direct damage of ringes, please outside a wrenches. Specifications: Material:Iron shell+copper joint Diameter:Approx.10cm/3.93inch Diameter of external thread: 12.5±0.3mm Diameter of internal thread: 11.5±0.3mm Pressure ranges: 0-10bar Temperature ranges: 0-120℃ Package Includes: 1pcs Temperature Pressure Gauges note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.