Is this one can or two? It is unclear in the description and the specifications. Does "7-12 gallons" mean that one 12-gallon can and one 7-gallon can are sold together?

Hi Customer, Yes, This is an 8-gallon and 2-gallon combo set. If you are looking for single units we also sell a variety on our website @ Ninestarsusa.com If you have any questions, please don't hesitate to reach out directly via phone. Thank you and have a wonderful day.