The pre-filled CBD vape cartridge by Alternate Vape is formulated with a high-CBD hemp extract. This 1ml cartridge lasts approximately 300-400 puffs, depending on usage and is made with 250mg CBD with a blend of terpenes for natural flavor. The pre-filled CBD Vape Cartridge is ready to use right out of the packaging. To use, simply twist the cartridge onto your compatible battery. This tank is compatible with low-voltage (max 5V) vape batteries. When finished, throw away the cartridge and replace it with a new one [battery can be re-used].