Pre-filled penGlass syringe encased in a disposable pre-filled pen. The pre-filled pen has a hidden needle, which will automatically insert into the skin when the injection button is pressed.Each pre-filled pen contains 0.5 ml of solution.Pack sizes of 2 pre-filled pens, 4 pre-filled pens and multipack containing 12 (3 packs of 4) pre-filled pens.VialClear glass vial with a sealed stopper.Each vial contains 0.5 ml of solution.Pack sizes of 1 vial, 4 vials, 12 vials, multipack containing 4 (4 packs of 1) vials or multipack containing 12 (12 packs of 1) vials.