You are purchasing 1 Brand New Mystery Ranch RATS Medical IV Bag in their standard Coyote color.

The dimensions on these are:

Dimensions - 15"x6"x2.5"

Intended Use: Backpack Accessory/Medical

Features:  Clear Vinyl Window, Hook Velcro back for medical use and organization

These are not sold separately on their website.  

Please email me with any questions.  Look at my feedback and purchase with confidence.