A mandrel ideal for making blown / hollow beads . The mandrel are 3mm thick x 270mm(10 1/2") long with a hole drilled through the tip , 1" from the end.Start by making two discs , either side of the hole and then bring the discs together ,after sealing the discs then start begin to blow .Start with the discs close to the hole as the further away they are the bigger the bead will be .