This group of pictures are of Hubbard & Co. pieces. They are not of exact size in the photos. The top picture shows on the left end a large primary wire wire holder used for streetlight applications. The weird ribbed one on the other end was also used for heavy duty wires but is not marked. I have an early Hubbard & Co. catalog that shows this piece. The bottom picure shows a very large loop wire holder which was used for dead ending. I have two of these and have only seen two others for sale in years past. I have yet to find a catalog showing this piece and it's intended use plus date of issue. Any info would be greatly appreciated.