The Silver Ruby Satin 2502s brushes have unique qualities that make them exceptionally good for use in calligraphy.  The bristles hold paint or ink quite well, yet they are not overly soft.  The brushes support their edges particularly well,  with the control and feel of interlocked bristle, yet more durable than natural hair. Sizes 4 and 6 are ideal for most work.   These are the same brushes used in some well-known calligraphy workshops.

The 2502s brushes are available here!