Our MRI safe fire extinguishers are available in a pre filled extinguisher or deionized water extinguisher. The agent in the MRI safe pre filled fire extinguisher is proven to be electrically non conductive, leaves no residue, and requires no clean up. The MRI safe water filled fire extinguishers are available in a 1 ¾ gallon kit or 2 ½ gallon kit. The non magnetic water filled fire extinguisher is best for hospital environments, telecommunications facilities, and clean room manufacturing facilities.