The Nitro O2 Tank Holder is the perfect solution for those who need to bring their oxygen tank along with them. This heavy-duty tank holder is designed exclusively for the Nitro Rollator, allowing you to take your oxygen tank with you on your outings. It conveniently attaches to the front of the Nitro without affecting any of the Nitro's functionality and can easily accommodate the most commonly used tank sizes, including ML6/A tanks, M4/A tanks, M9/C tanks, M6/B tanks, and M15/D tanks.