Arcus Viola Bow M7 Silver. The special feature of the M-series bows is their perfect balance both in their sound character and their play and feel. The shape of their sticks is round and they are a little more flexible than the S- and P-bows. They are a little lighter than the P-bows though they offer the same stability due to a weigt distribution towards the extremes. They make it easy to play any repertoire and fit almost every instrument perfectly, as they pull an especially open sound with a great range of colours