What is the difference between a 4110-18, and a 4110-18 CUSH drop plates?

The 4110-18, and 4110-18 CUSH  drop plates are identical. The difference between a 4110 EDA, and a 4110 CUSH is the templating on the door. That is why you order them differently, to get the correct template. For EDA order a 4110-18, and for 4110 CUSH order a 4110-18 CUSH.

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