This film dryer has been used lightly and intermittently over the years and is in excellent condition. The dryer dries film after the film has been processed. Any size of film that can be rolled on a stainless steel reel can be dried in this dryer. It can accommodate up to five 35mm reels and three 120 reels. It has a 10-minute built-in timer and has a switch for warm or cool air. When I used this I had it mounted to a wall in my darkroom. Mounting hardware is included.