It's important to understand fire classes.
It's all based on the material you are extinguishing.

iCan 9kg Powder Fire Extinguisher - High-Capacity - Proactive Fire Safety for Large Spaces
5.0

Smartwares - Fire Extinguisher Powder - 6 kg - ABC Classified - FEX-15162
4.0

FSS UK Plus 2 X 2 KG ABC Dry Powder FIRE Extinguisher. CE Marked. Ideal for Homes Kitchen Workplace Offices Cars Vans Warehouses GARAGES
4.0