The 49222/36850 limit switch will replace the obsolete (red, blue and black) 49222 limit * Compatible with all Stanley screw drive garage door openers that have safety sensors. * NOTE The 49222 limit included both limits and wire. The new part 36850 limit switch is sold individually and includes a short length of wire to splice into existing wire and the connectors to do so. * If you need to replace both limits, order two. * Compatible with Stanley garage door openers from 1993 to current.