These reel sleeves are designed for View-Master and other compatible reels, featuring a large front opening for easy access. Each pack contains 25 new, unprinted plain white envelopes. The sleeves are made with a high clay content to meet archival standards, addressing a limitation of original View-Master sleeves which were not archival. They have an off-white color and a large center hole to allow clear visibility of reel titles. These sleeves serve a practical purpose in preserving and protecting reels from dust damage. They are a functional replacement for original sleeves that may be worn, torn, marked, or missing. The plain white design follows the style used by View-Master for their special reels. For additional options, 3Dstereo offers authentically printed single and three-reel envelopes suitable for View-Master reels from various time periods.