This is a standalone bottle for Nitrous, Oxygen, etc. A double bottle set is also availabe with a lower per-unit cost.
It is a scale 7" bottle with a detailed valve on top.
It can be configured as two different lengths with interchangeable bottom sections. This would equal 5lb and 10lb bottles.
The valve detail is excellent.
Included parts shown. Photo of real bottle.
Contains one Ultra Frosted Detail bottle with 3 pieces, 1/16 scale.