Box extra-deep, serial
  - Box with special rectangular knockouts and large break-out surfaces.
  - Includes 2 screws for mounting accessories. 
  
 Accessories matching the box:
  - Spacing rings PD60x12, PD60x24, PD60x30.
  - Cover cover W60 or PL60, KD12 spacer.
  - W16, W25, W40 screws.
  - PS60 signaling cover.