Features: 1. Made of high quality material, solid and to use. 2. Stable performance and good using effect. 3. Professional manufacturing, exquisite workmanship, high reliability. 4. The Optical Fiber outer diameter is 2.2mm, optical fiber inner diameter is 1.0mm. 5. Probe Thread Size is M3, can meet corresponding installation requirements. Specification: Condition: 100% Brand New Item Type: Fiber Optic Sensors Model: PT-310 Induction Method: Light Perception Optical Fiber Outer Diameter: 2.2mm Optical Fiber Internal Diameter: 1.0mm Probe Thread Size: M3 Line Length: Approx. 1m / 3.3ft Package List: 1 * Optical Fiber 4 * Nut 4 * Non-slip Gasket Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.