4-16 mm
Tool designed: 
Brass, cooper and aluminium sheet rolling/bending tool with hard stainless steel rods
You could rolling your part as a barrel or bend for the right arc.
Hard, eloxed aluminium base with 80mm long CNC machined grooves and rods.
6 different metric size. The grovees are bigger 0,3mm than the rods wich help to you to place and bend your 0,15 PE parts.
Made in the EU