The 25mm and 32mm Concave kit The 32mm Concave Former125mm Center Line RadiusAs with all our formers they are machined from solid 1045 bar.Suitable for BendingMild Steel 25nb(26.9mm) x 2.6 , 3.2 and 4mmAluminium 32mm x 3mmPLEASE NOTE (At this stage not suitable for 1.6 in Aluminium or 2.00 in steel or Stainless Steel )  The 25mm Concave former125mm Center Line RadiusFor bendingStainless 25mm x 1.6mmAluminium 25mm x 1.6 and 3.0020nb (26.9mm) x 2.3, 2.6 and 3.2mm