The 050078 00 VON DUPRIN CONVERSION KIT is an Electric Latch Retraction Assembly 51SL is a high-quality commercial door hardware designed specifically for fire exits. Made by the trusted brand Ingersoll Rand, this assembly ensures reliable and smooth operation of your electric latch. The model is designed for compatibility with the Von Duprin 51SL, providing a secure and functional solution for your commercial door needs. Item is new. I opened the box to show pictures. Will have label attached to the box.