2A: The “A” rating is for ordinary combustibles like wood, paper, and cloth.
The number “2” means it is equivalent to 2.5 gallons of water in terms of firefighting capacity.
10BC: The “B” and “C” ratings are for flammable liquids
(like gasoline or oil) and electrical fires, respectively.
The number “10” indicates the extinguisher can cover
10 square feet of a Class B fire