The Safety Stop sign was created to prevent accidental entry and/or equipment entry into the MRI field that could cause potential damage and injury. The Safety Stop stop sign installs in the door jam as a final barrier to the MRI field. The sign swings in an in and out fashion, and always swings back to a closed position. The Safety Stop stop sign fits a standard 48" door opening and is made of acrylic. The Safety Stop stop sign can be customized to fit most door sizes and is available in Spanish and English. * Note: Door includes non magnetic plastic hinges