Pro Plus Multi Purpose Dry Chemical Fire Extinguisher ABC Type, 20 lb (Average) no checkout Added carbon layer helps filter Added carbon layer helps filter out nuisance levels of ozone and organic vapors (less than OSHA PEL) For most welding applications HandyStrap® with buckle allows mask to comfortably hang around neck when not in use Ventex® valve lets the hot air out faster so workers stay cooler The solid black color stays cleaner looking longer preventing pre mature disposal even color laydown Thick Easy to read gauge tells you fire extinguisher is charged and ready for use Rechargeable fire extinguisher for multi purpose use Clear instruction label using graphics to show steps required to operate extinguisher Easy to pull safety pin Tough impact resistant metal valve