BARREL ASSY, SERVICE TOOL FOR OPTICAL ADJUSTMENTS (To make the 7th Group Centering)  for CANON  LENS MODELS:


EF 70-200mm 1:2.8 L IS II USM (MARK II) & 
EF 70-200mm 1:2.8 L IS III USM (MARKIII)

Picture of the actual item. What you see is what you get.

L1