Available in single or dual tank capacity, this versatile carrier also features an adjustable snap for holding either D or E cylinder. The single carrier features a design made of durable, lightweight nylon while the dual carrier is made up of a lightweight vinyl mesh and offers a convenient storage pocket for items like magazines, nasal masks, etc.Fits Any Wheelchair: Extra long straps adjust to fit any wheelchair and allows the carrier to be positioned off-center, avoiding uncomfortable contact with head or back. Two Styles Available: Available in a single or dual tank capacity. The dual carrier features a convenient storage pocket for magazines, nasal mask, etc. Accommodates "D" or "E" Cylinders: The Wheelchair Oxygen Carrier features adjustable, heavy snaps which allow easy conversion for holding either "D" or "E" cylinders. Easy Care: Hand wash using cold water and mild soap, then line dry. NOTE: If you have concerns about allergies or how the recommended cleaning solution may affect your health, please consult with your physician or other healthcare professional before using so he/she can recommended alternatives. One-year warranty.