The H3R Performance MaxOut MX250C Fire Extinguisher utilize a specially fluidized and siliconized mono ammonium phosphate dry chemical and contains a siliconized sodium bicarbonate based dry chemical with free flowing and non-caking additives. All MaxOut models effectively smother and break the chain reaction of fires involving flammable liquids and pressurized gasses, and will not conduct electricity back to the operator. MaxOut MX250C are also highly effective at stopping fires of common combustibles like wood and paper. Great for marine or residential use. IMPORTANT SHIPPING INFORMATION: UPS 2nd Day Air Service is NOT available. This item must be shipped via UPS Ground Service ONLY. Ground Service can only be delivered within the 48 continental United States.