Lot numbers: 20310140, 20910540, and 20910541. (All lot numbers having the last two digits ending in 40 or 41 and having the year of manufacture for individual unit or sterilization date for cases from 01 on a unit and 2001 on to case to 03 and 2003. Expiry year dates are 04 or 2004 to 06 or 2006. An example date is 01 03 09 on a unit which is read 2001 March 09 and for the case with the same date an example would be 2001 03 09.)