Better Packages
BP555S and BP555L Clutch Rollers
Key Drum - Measuring parts - Clutch Rollers - Underside View - Moistening Parts
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The old style BP555 dispensers used two different types of clutch rollers.
The left clutch roller fits on the BP555S, BP555L36, BP555L-45 and BP556. The part number is EA52AXX.
The clutch roller on the right fits the BP555L-72 and BP555L-90. The part number is ELA52XX.
Note the main difference is the distance between the rubber roller and the gear.