The 2509N reels offer the most economical start for processing your own 4x5" sheet film (or 6x9cm or 9x12 cm film). JOBO reels 2509n are the perfect fit for the tank system 2500. Includes one reel 2509N with film and flaps for good chemistry distribution in rotary processing for both 4x5" and 9x12 cm sheet film.