The tapes are about half an inch wide and two thousand feet in length and are run from their reel, through tensioning devices, across read-write heads, to a take up reel.

• 磁带大约有半英寸宽，两千英尺长，并且运行在它们的卷轴上，经过张力调整器，通过读-写磁头，然后在卷轴上卷起。