Apply a strip to each end of the tape, or leader tape, and, if your machine has the function, the foils will reverse the direction of the machine and play the other side of the tape.
 
Width: 1/4′′ (6.25mm)
Pre-cut, 3cm lengths of aluminium reversing foil. 
Works with all machines that have a reverse function
Can easily be removed from the tape, leaving no residue. 
Suitable for many consumer reel-to-reel machines
Sufficient for four reels of tape