They are slowly shrinking with age, based on the oem codes, the left two (-T5W-) were made around 2008, the right one (-VH-) was made back in 1994-1997) [Lauver's list]
Both were made by Danaher...*
2oz of steel adds up in shipping......
*Having multiple divisions tho, this is less meaningfull than it might otherwise be...