Weather Guard Replacement Ultralock (LOCK ONLY) For Weather Guard Series 3 Crossover And Lo-Side Boxes Model 70043RWeather Guard Replacement Ultralock (LOCK ONLY) For Weather Guard Series 3 Crossover And Lo Side Boxes Model 70043R The Weather Guard 70043R replacement Ultralock is a replacement lock assembly for all series 3 Weather Guard crossover and side mount boxes. The series 3 boxes are the crossover and side mount boxes with 03 at the end of the part number. This kit includes the lock assembly itself. Please follow the provided instructions when installing