Brand new and high quality. Feature: This flow indicator is used to observe water flow speed in water cooling systems, in case the pump stops working and causes overheating. The design is novel, simple, and practical, easy to install, compact, and durable. Green impeller allows for easy observation, commonly used in computer or other water cooling systems. G1/4 standard thread fits most computer cooling tubes or connectors. In addition to monitoring water flow, it also serves as a decorative element. Specifications: Material: Tungsten alloy Color: As shown in pictures Dimensions: 4.4 x 3.5 x 2.5 cm (L x W x H) / 1.73 x 1.38 x 0.98 inches (Approx.) Thread: G1/4 2 thread Impeller: 5 blades Quantity: 1 piece Note: 1. Conversion: 1 cm = 10 mm = 0.39 inch 2. Please allow 0–1 cm error due to manual measurement. Ensure you are comfortable with this before purchasing. 3. Due to differences in monitor displays, the picture may not reflect the actual color of the item. 4. No retail packaging included Package includes: 1 x Flow Indicator (Other accessories shown in the image are not included)