Features [Wide range of application] The removable back cover of the digital probe gauge is used on different magnetic pressure gauge bases. [Sturdy and durable] The probe indicator gauge adopts a metal integrated structure, which is stable and durable with high precision. [Multiple unit conversion] It can switch between millimeter and inch. [Easy to read] The digital indicator uses a large screen display, you can read it very clearly. [Easy to replace] You can replace a longer probe as needed. Specifications: Model: AL1271 Material: Aluminium Alloy Resolution: 0.01-0.01mm Battery: 1.5V Button Cell(LR44)(not included) Probe Head Range: 0-12.7mm Weight: Approx. 246g / 8.7oz Package Included: 1 * Digital Indicator 1 * Rear Cover Note: Please allow some error due to manual measurement. Thanks for your understanding. Package List