Oxygen Mask 40 Pack – Adult Medium Concentration Bulk pack of 40 adult masks. £198.00 Oxygen Mask 40 Pack - Adult Medium Concentration quantity Add to basket Description Bulk pack of 40 adult, medium concentration masks. You might also like Oxygen Mask 80 Pack – Adult Medium Concentration £396.00 Add to basket Oxygen Breathing Headset £27.00 Add to basket Oxygen Mask Adult Medium Concentration £4.95 Add to basket