agFileSize 1.3.6.1.4.1.1872.2.5.1.1.18.1

This is the number of octets in the file. This is set to indicate the total size of the file that is being transfered. The value is set in bytes. File size range for Bogon File Transfer 1 - 2097152 and for Symantec Signature 1 - 178176