The Ultra Gear Box will easily hold 2 to 3 tanks plus a mask and 500 balls, with enough room in the tray for your small tools and misc. items. It has a small compartment in the lid also for more accessible items. The Ultra Gear Box comes with a shoulder strap for easy carrying. It is just the right height to use as a seat in the field. It is lockable and very sturdy. The Ultra Gear Box comes in camo green.* A Rufus Dawg small parts box is included.