Hamilton Buhl 2A615-80 Roll Attachment for Open Head 20 Series Overhead

The Hamilton Buhl 2A615-80 Roll Attachment is almost a must for anyone who does classroom work on a regular basis. With an overhead projector, this accessory provides a continuous way to maintain your audience's attention without having to stop to change transparencies. By adding a 50' roll of film, you can maintain control of your lecture.