Major brushes assorted polystyrene balls major brushes 795 75b p buy polystyrene balls assorted pack of 75 50 x 35mm and 25 x 70mm an assorted pack of expanded polystyrene balls from major brushes these balls can be carved glued painted and decorated with a variety of different materials they are ideal for ink marbling and christmas decorations p major brushes polystyrene balls assorted pack of 75 50 x 35mm and 25 x 70mm