Suitable for use on Class A (trash wood & paper) Class B (liquids & gases) and Class C fires (energized electrical equipment). The Pro 10 MP unit is fitted with a pressure gauge that provides at-a-glance status cylinder is manufactured from impact resistant steel and the valve assembly is all metal.Be prepared; choose ProLine dry-chemical extinguishers for your commercial fire-suppression needs. Crystal-clear step-by-step instruction label helps ensure effective use in a crisis. Easy-to-read reliable pressure gauge simplifies inspections. Smooth-action impact-resistant valve and lever ensure hassle-free operation. Lock-safe easy-pull release pin minimizes accidental discharges without compromising emergency-reaction times. Rechargeable.