Features Spring Steel Construction - Crafted from high-quality spring steel, these tubes resist heat and wear, ensuring long-lasting performance for all your bending needs Exceptional Elasticity - Designed to maintain their shape, these tubes exhibit superior elasticity, allowing for repeated bends without deformation for reliable use over time Versatile Sizing Options - This set includes 5 different diameters, catering to a variety of projects and applications, making it an ideal choice for diverse bending tasks Enhanced Bending Performance - Compatible with pipe benders, these tubes improve bending accuracy and efficiency, serving as excellent replacement parts for optimal results Multi-Material Compatibility - for use with copper, aluminum, and thin-walled steel pipes, these tubes provide convenience and versatility for various plumbing and fabrication tasks Features: 1、These spring tube are made of spring steel, which is heat？resistant, ？resistant, and has good relaxation resistance. 2、These tube have super elasticity and will not be deformed no matter how they bend during use. 3、Provide 5 kinds of spring pipe with different diameters, which can meet your diversified needs. 4、These spring tube can be used with pipe benders to obtain better results and are also good replacement parts. 5、These spring tube can be used for copper pipes, aluminum pipes, thin？walled steel pipes, etc., bringing a lot of convenience to your life. Specification: Item Type: Bender Spring Material: Spring steel Specification: 1/4in: Length: Approx. 200mm / 7.9in, outer diameter: Approx. 9mm / 0.4in, inner diameter: Approx. 7mm / 0.3in 5/16in: Length: Approx. 205mm / 8.1in, outer diameter: Approx. 10mm / 0.4in, inner diameter: Approx. 8.5mm / 0.3in 3/8in: Length: Approx. 200mm / 7.9in, outer diameter: Approx. 12.5mm / 0.5in, inner diameter: Approx. 10mm / 0.4in 1/2in: Length: Approx. 207mm / 8.1in, outer diameter: Approx. 16mm / 0.6in, inner diameter: Approx. 13.5mm / 0.5in 5/8in: Length: Approx. 200mm / 7.9in, outer diameter: Approx. 19.5mm / 0.8in, inner diameter: Approx. 16.5mm / 0.6in Package List: 5 x Bender Spring Package List 5 x Bender Spring