The external bending spring is an essential tool for bending aluminum-cored pipes without the risk of kinking. Here are its key features: Compatibility: Designed for use with 16mm external diameter pipes, it is suitable for both Pro Warm Pert-al-pert and pex-al-pex pipework. Kink Prevention: By using the bending spring, you can significantly reduce the risk of kinks when bending the pipe, ensuring smooth and reliable installations. Robust Design: The bending spring features a robust design with a wide opening, making it easy to fit onto the pipe. This design ensures durability and ease of use during bending operations. This tool simplifies the bending process, allowing you to achieve smooth bends without compromising the integrity of the pipe. It's a valuable accessory for any installation involving aluminum-cored pipes.