This built-in copper pipe bending strip set is designed for bending HVAC copper lines. It provides insulated bending capabilities for 1/4 inch (red), 3/8 inch (green), 1/2 inch (yellow), and 5/8 inch (blue) tubes, making it a must-have for HVAC professionals and DIY enthusiasts. Key features and benefits - Versatile and reliable: Conforms to four common tube sizes with insulated bending features, enabling precise bends without damaging the copper. - Durable construction: Made from high quality PE plastic for lasting performance and consistent bend results, improving installation or repair efficiency. - Color coded for ease: Red (1/4"), Green (3/8"), Yellow (1/2"), Blue (5/8") are clearly color-coded to speed identification and reduce errors. - Indoor pipe applications: Specifically designed for indoor piping, delivering precise, smooth bends that preserve tube integrity in tight spaces. 2-3 practical use scenarios - HVAC installations in confined areas such as attics, crawl spaces, or behind appliances, where neat, uniform bends are essential. - Repair work in tight cabinets or behind dashboards where space is limited, ensuring professional-looking bends without kinking. - Retrofits or re-piping projects that require clean, consistent bends to fit existing layouts and maintain system performance. This set helps you achieve professional results with accuracy, durability, and speed, while protecting copper tubes during bending.