OO Gauge 3D Resin Printed Mirrors for Class 66s. Unpainted set of 4 supplied to stick on. Upgrade your Bachmann or Hornby/Lima models to modern standards. (Also available for 7mm O gauge and G scale - just ask) Another class 66 detail you might want to improve on are the dummy couplings - see precisionlabels.com for proper scale combo knuckle hook couplers.