These are single Grafmatic 45 septums, modified by Mercury Works to accept either 65mm or 70mm film in 6x12 panoramic format. Our 65mm septums accept 65mm motion picture film. To quickly and easily cut strips for these septums, check out our 65mm Cut Film Guide. Our 70mm septums accept any 70mm film, perforated or unperforated.  They contain an additional notch so they can be differentiated in the dark from 65mm septums. To quickly and easily cut strips for these septums, check out our 70mm Cut Film Guide. See this video segment for a demonstration of these custom septums.  They can be mixed and matched in the Grafmatic 45.