I am looking to get a couple of whole plate film holders. The ones which will fit my Premo No. 6 are marked Eastman Kodak or Graphic film. The 6 1/2 x 8 1/2 WP holders which fit my Premo No. 6 are 7 1/2 inches wide and 10 1/16 inch total length (excluding the darkslide handle) with the critical length measurement of 9 3/16 inches length from the end of the WP holder to the riblock.