This Hasselblad 70mm back is designed to accept reloadable 70mm film cartridges (3 empty ones are included). Loads up to 4.5m of sprocketed film, for up to 70 exposures. It should be noted that 70mm film is not something you can just walk into a store and buy, and Im including this store in that list. But if you have access to 70mm film (or you just want to pretend to be an astronaut) then here you go. Its in excellent condition.