This versatile 4 millimeter (approximately 0.157 inch) outside diameter copper tubing is perfect for a variety of plumbing, HVAC, and DIY applications. The tubing offers excellent thermal conductivity and corrosion resistance, making it ideal for both residential and commercial projects. Its consistent diameter and smooth surface ensure reliable connections and optimal flow characteristics. The malleable nature of copper allows for easy bending and installation while maintaining structural integrity. This tubing is suitable for water lines, refrigeration systems, and various mechanical applications. The durable construction provides long-lasting performance under normal operating conditions. Remember to follow local building codes and proper installation techniques when using this tubing for your specific application.