Features: The fluorescent leak detector emits a bright yellow-green light when illuminated by the UV leak detector to detect fluid leaks in various systems. It can also be widely used in refrigeration systems, hydraulic systems, lubrication systems, fuel systems, etc. Add the fluorescent agent, then let the system run for 20 minutes. Wear special glasses and use a leak detector to illuminate the leaking pipe. The leak will be fluorescent yellow-green. Precise, easy to use, pollution-free and environmentally friendly. Specifications: Material: Liquid Size: Approx.2x11.5cm/0.79x4.53in Capacity:2.5ml Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Air Conditioner Leakage Test Agent Have a great time shopping!