<P><STRONG>Features:</STRONG></P> <UL> <LI>AVI CO2 cartridge - 100 Pack <LI>12 gram  <LI>*Cartridge brand may vary*</LI></UL> <P><STRONG>**Note: Because CO2 Cartridges are under pressure, they are not  allowed to ship via any air transportation. Orders that have selected air  shipping and include CO2 cartridges will automatically be modified to ship in  separate packages. Additional freight may apply.**</STRONG></P>