The Zex 5 lb Nitrous Bottle with Valve is compatible with most nitrous systems The 5 lb design is smaller than most bulky 10 lb bottles and is perfect for harder to fit areas or hiding the bottle. Whether you're adding a bottle, want an extra bottle for quick swaps when its time to fill, or even have another brand of nitrous kit and like the look/design of the Zex bottle, this bottle will meet your needs! The bottle features a high flow bottle valve, good for applications up to 300 HP and has an anodized black finish that not only is show quality, but is resistant to chipping and scratches.