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 Cannula Mask Adult £8.95 Add to basket Oxygen Mask Child Medium Concentration £5.50 Add to basket Oxygen Breathing Headset £27.00 Add to basket