Copper Tube Bender Bending Tool Outdoor Aluminum Tube Spring Bending Machine Feature: Cheapest And Simplest Way To Put A Bend In A Piece Of Copper Pipe! Using a Perfect Curve Tube Bender is the cheapest and simplest way to put a bend in a piece of copper pipe. As a general rule, the minimum bend radius should be equal to 4 times the outside diameter of the tube.Tube diameter 22mm – minimum bend radius = 88mm. Perfect Curve Tube Bender suitable for Tube diameter 15mm – minimum bend radius = 60mm. Different sizes acting on different pipes can better satisfy your choice of different pipes. One section of the pipe bender is enlarged to ensure that it is not easy to be used and easy to operate. If you need to bend a pipe that has a diameter smaller than 15mm then you should use an external Perfect Curve Tube Bender. First,Feed the pipe into the spring via the wider tapered end. After that use Perfect Curve Tube Bender apply pressure to the ends of the pipe and gently form the desired bend. Bending too quickly or violently will result in a creased or rippled pipe. Last of the step, Slide the spring off the pipe. If you find this difficult, try twisting as you pull to slacken the springs. Then,Your job is complete! Specifications: Material: spring steel Surface treatment: chromium plating Size: length 21 cm/8.27" Packages Included: 5 x Spring Pipe Benders Size: length 21 cm/8.27" Material: spring steel Surface : chromium plating Cheapest And Simplest Way To Put A Bend In A Piece Of Copper Pipe! Packages Included: 5 x Spring Pipe Benders