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 line wire (pressure gauge movement, silk, table light, on the same line, by hand pull (header rotation, due to the uneven can cause pressure gauge structure deformation, damage effect use effect and internal structure or old direct damage of rings, please outside a wrench. Specifications: Material:Plastic Diameter:Approx.10cm/3.93inch Thread: G1/4 Diameter of external thread: 12.50.3mm Diameter of internal thread: 11.50.3mm Pressure range: 0-10bar Temperature range: 0-120 Note: 1. First find the mounting hole of the water distributor and measure the size of the internal thread with calipers. 2. Determine whether a thermometer can be installed, and then use a wrench to tighten the thermometer to observe the pressure and temperature. Thanks for your understandings. Package includes: 1x Temperature Pressure Gauge