Deluxe Mammography Marker Set features aluminum-backed, high-density lead letters. Full range of color-coded markers necessary for ACR compliance are easy to use. Right markers are red and left markers are blue. R, L, or M and base abbreviations on one marker. Includes 56 markers on attractive, walnut-grained wallboard. Hook and Loop, Hanging Hole or Suction Cup style. Markers cannot be returned.