B-1 Extinguishers are USCG approved and meet the need for a Type B, Size 1 USCG approved Fire Extinguisher.
Amerex B-I Fire Extinguishers must be:
Dry Chemical, ABC, or Purple K: 2 lbs or larger
Carbon Dioxide (Co2): 5 lbs or larger
Halon: 2.5 lbs or larger
Halotron: 11 lbs or larger