Features: There are 3 types, horizontal plastic for shell/horizontal iron for shell/vertical iron for shell, selecting based on your needs. Measures pressure with dual scale (psi/kPa). Made of high quality plastic & iron, durable & long for time service. Screw external diamter: 9.6/12.8/13mm. Range: 0-12Bar/0-180Psi, 0-12kpa(bar)/0-180Lb/in(PSI), 0-16Bar/0-230Psi. Suitable for use on Air, Gas, Water, Fuel or any non-corrosive medium. Specifications: Material : Plastic+Iron Range: 0-12Bar/0-180Psi, 0-12kpa(bar)/0-180Lb/in(PSI), 0-16Bar/0-230Psi Size 1: 39.8x25x9.6mm/1.57x0.98x0.38in Size 2: 28.2x27.5x12.8mm/2.29x1.08x0.5in Size 3: 52x25.6x13mm/2.05x1x0.51in Diameter 1:59.8mm/2.35in Diameter 2: 53.6mm/2.11in Diameter 3: 41.5cm/16.34in Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Pressure Gauge