The field specification for the CSV file is simply a single column of serial numbers. The following is an example of a serial number CSV file:
1QCSUCTB82OMVJH
ZUM7SGA2PWS12DC
XTF76Z5G1RQW3HC
7AEQWPK5PXMMS5E
VK3YJF20RVDI8TN
SUELS613BWUSWGE
X5M96I1LQZTK9J4
3QKPC56DOQ7LCYS
OTYW9RABOR71WVX