code: def ID_SDR_all_available(SDR):
      
      ID = []
      ND = ND_all_available()
      for i in range(len(ND)):
          ID.append(ID_SDR(ND[i], SDR).magnitude)
      return ID * u.inch
docs: Return an array of inner diameters with a given SDR.
  
      IDs available are those commonly used based on the 'Used' column
      in the pipedb.