Murano glass tubes, in a with their curved shape are ideal for creating wonderful bracelet designs. The unique shape of murano tubes beads requires exceptional skill to make as there is a very real risk of damaging the bead and making it unusable. The bead maker bends the hot, soft copper rod, called a mandrel to make the curve in the bead. This must be done very carefully so as not to pinch the soft copper rod, closing the hole. Murano glass tubes, in a with their curved shape are ideal for creating wonderful bracelet designs. The unique shape of murano tubes beads requires exceptional skill to make as there is a very real risk of damaging the bead and making it unusable. The bead maker bends the hot, soft copper rod, called a mandrel to make the curve in the bead. This must be done very carefully so as not to pinch the soft copper rod, closing the hole.