Brand new & high quality. Feature: This flow indicator is used to observe water flow speed in water cooling systems, helping to identify cases where the pump stops working and causes overheating. The design is novel, simple, and practical, with easy installation, compact size, and durable construction. The green impeller allows for easy visual monitoring and is commonly used in computer or other water cooling systems. G1/4 standard thread ensures compatibility with 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.) Screw: 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 actual color may vary slightly from the picture. 4. No retail packaging included. Package includes: 1 Piece x Flow Indicator (Other accessories shown in the image are not included)