Color Coded Convenience Our extension tubes come in four color coded sizes: 1/4 inch (red), 3/8 inch (green), 1/2 inch (yellow), and 5/8 inch (blue). This feature allows quick identification and streamlined usage, improving efficiency. PE Material Made from PE material, these extension tubes resist wear, tearing, and environmental factors. This ensures prolonged performance and reliable service for all your HVAC needs. Versatile Compatibility Designed for seamless connection between condensers, evaporators, and various refrigeration components, these extension tubes are compatible with a wide range of HVAC systems. They are an essential tool for technicians. Smooth Internal Flow The tubes are designed for smooth bends without kinks, safeguarding copper pipes and maintaining fluid flow. Preventing damage during bending ensures enhanced durability and performance. Use scenarios During installation or service of central air conditioning, select the appropriate size tube to connect condenser and evaporator, ensuring proper fit and efficient operation. In refrigeration servicing, quickly join multiple components within a single system, reducing setup time. In retrofits or repairs, route tubes with gentle bends to avoid kinking copper lines, preserving system integrity and reliability.