AP Photo's Multi-Format Classic Self-Feed Film Reel is intuitive and adjustable, designed to accept 35mm 126, 127, or 120/220 roll film formats. Two ball bearings are integrated near the film guides in order to prevent backward movement and permit a convenient ratchet-style, automated method of spooling your film when working in complete darkness. Its plastic construction is heat-resistant up to 212°F for cleaning and sterilizing in boiling water after use.