The ROTHENBERGER Copper Tube Bending Springs are specifically designed for 5/8" O.D. copper tubing. These springs prevent kinking and ensure smooth bends, making them essential for plumbing and HVAC applications. Constructed from durable materials, they provide long-lasting performance and reliability. The springs are easy to use and compatible with various bending tools, allowing for precise and efficient bending of copper tubes. Ideal for both professionals and DIY projects, these bending springs are a must-have for any plumbing toolkit.