The HP Combi-Plan 4 x 5" Film Carrier with Guide is a daylight processing system.This HP Combi Tank allows you to load 6 film sheets on the carrier while workingThe loading of films in the carrier and processing of the film needs to be done in darkness and daylight respectivelyThe HP Combi-Plan 4 x 5" Film Carrier with Guide  is a type of developing tank accessory, and it comes with a loading process guide