The MTMA (Magnetic Transparency Media Adapter) is a revolutionary new patented device for scanning both positive and negative film in multiple format sizes - up to 7"x10" on a legal scanner and 7"x7" on a letter-size (A4) scanner. The MTMA has magnets attached on the underside of the adapter that allows it to be pulled along by the scanner mechanism once you start scanning, resulting in smooth, hands-free film scanning. The MTMA works with the ScanMaker X12USL, ScanMaker 4700, ScanMaker 4600, and ScanMaker 4600 with Digital Camera.