This 3/8" wide flat strip metal x 1/16" thickness x 36" long x 30 pieces per tube, is annealed and has a rolled edge. In 44 years of using this metal, we have never found a hard spot. No flake metal so ideal to use with Metalcraft Practical Range of Tools. Nice size metal for making smaller projects and to build prototypes. Comes in cardboard tube for easy storage.