Barrel Weights   The weights are blued, concave,  with a two sided tape to fit the barrel. The weights are available in (3) different sizes; 2” long x 2-1/2oz, 4” long x 5 oz, & 6” long x 7-1/2oz. The package comes with a rubberized positioning device to apply the weight to the barrel and slide it back and forth to get the weight where it is needed. Mark the barrel, clean the surface, & apply the weight.