This is for a Zebra 170PAX4 Door-Open Switch Replacement Kit. The part number is G57355M. This is unused, but for some reason, it is missing the 49858 - Nut Bar. It is in the original packaging with the instruction sheets and box, the box has been opened. We originally bought this to use, but didn't end up needing it. Thanks for looking and don't forget to check out our other listings.